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To Mars via the Moon: An Astronomical Story
To Mars via the Moon: An Astronomical Story

Chapter XXIII · Chapter 23

Chapter 23 of To Mars via the Moon: An Astronomical Story is here in full — 103 sentences across 21 reading sections, with audio for every sentence and word.

Cover illustration for To Mars via the Moon: An Astronomical Story
Context Illustration Reading 1/20 · 5 lines
English subtitles · tap any word to listen 1 / 5
CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.
Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.
Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.
We have already seen several of these phenomena, and I will now describe what we have observed.
Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.
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LEARNER DICTIONARY
Archivist
/ˈɑːrkɪvɪst/
Editorial verification pending

A keeper or guardian of historical records and memories.

To Mars via the Moon: An Astronomical Story

Chapter XXIII · Chapter 23

Chapter 23 of To Mars via the Moon: An Astronomical Story is here in full — 103 sentences across 21 reading sections, with audio for every sentence and word.

Reading 1/20 · 5 reading units · Lines 1–5

Line 1
CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.
Line 2
Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.
/bɪˈsaɪdz ðiːz ædˈvæntɪdʒɪz ðə ˈræpəd ˈmuːvmənts ʌv ðə tuː ˈsætəlaɪts ʌv ðə ˈplænət rɪˈzʌlt ɪn ə ˈkɑːnstənt səkˈseʃən ʌv səˈlestʃəl fəˈnɑːmənə wɪtʃ əˈfɔːrd ˈveri ˈfriːkwənt ˌɑːpərˈtuːnətiz fɔːr moʊst ˈɪntrəstɪŋ ˌɑːbzərˈveɪʃənz/
Line 3
Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.
Line 4
We have already seen several of these phenomena, and I will now describe what we have observed.
/wiː hæv ɔːlˈredi siːn ˈsevrəl ʌv ðiːz fəˈnɑːmənə ənd aɪ wɪl naʊ dɪˈskraɪb wʌt wiː hæv əbˈzɜːrvd/
Line 5
Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

Learner Dictionary

These definitions explain words found in the current reading and keep every example grounded in its original sentence.

Oxford-style entry order: headword, part of speech, US IPA, concise definition, contextual example, and audio.

astronomer noun US /əˈstrɑːnəmər/

a physicist who studies astronomy

From this reading “CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.”

eclipses noun US /ɪˈklɪpsɪz/

plural of “eclipse” — one celestial body obscures another

From this reading “Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.”

gravitation noun US /ˌɡrævɪˈteɪʃən/

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface

From this reading “CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.”

Martian noun US /ˈmɑːrʃən/

imaginary people who live on the planet Mars

From this reading “Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.”

occurring verb US /əˈkɜːrɪŋ/

inflected form of “occur” — come to pass

From this reading “Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.”

Phobos noun US /ˈfoʊboʊs/

the larger of the two satellites of Mars

From this reading “Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.”

satellites noun US /ˈsætəlaɪts/

plural of “satellite” — man-made equipment that orbits around the earth or the moon

From this reading “Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.”

transits noun US /ˈtrænzɪts/

plural of “transit” — a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod

From this reading “Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.”

All words in this reading · 108

Every word in these five lines is listed here, and every one of them can be played on its own.

Dictionary details are shown only when verified; these are not licensed Oxford entries.

AdeterminerUS /ə/

used before a singular noun to mean one of a group, when it is not a particular one

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

advantagesnounUS /ædˈvæntɪdʒɪz/

plural of “advantage” — the quality of having a superior or more favorable position

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

affordverbUS /əˈfɔːrd/

be able to spare or give up

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

airnounUS /er/

a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

alreadyadverbUS /ɔːlˈredi/

prior to a specified or implied time

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

alwaysadverbUS /ˈɔːlweɪz/

at all times; all the time and on every occasion

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

andeterminerUS /æn/

the form of “a” used before a word that begins with a vowel sound

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

andconjunctionUS /ənd/

used to join words or parts of a sentence that go together

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

apartadverbUS /əˈpɑːrt/

separated or at a distance in place or position or time

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

appearingnounUS /əˈpɪrɪŋ/

formal attendance (in court or at a hearing) of a party in an action

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

approachingnounUS /əˈproʊtʃɪŋ/

the event of one object coming closer to another

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

areauxiliary verbUS /ɑːr/

the form of “be” used with you, we, they, or a plural noun

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

astronomernounUS /əˈstrɑːnəmər/

a physicist who studies astronomy

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

atprepositionUS /æt/

in or near a particular place or position

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

attentionnounUS /əˈtenʃən/

the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

attractverbUS /əˈtrækt/

direct toward itself or oneself by means of some psychological power or physical attributes

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

beingauxiliary verbUS /ˈbiːɪŋ/

the -ing form of “be”

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

BesidesprepositionUS /bɪˈsaɪdz/

in addition to; as well as

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

brilliantlyadverbUS /ˈbrɪljəntli/

with brightness

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

butconjunctionUS /bʌt/

used to introduce something that contrasts with what came before

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

cnounUS /siː/

a degree on the centigrade scale of temperature

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

CELESTIALadjectiveUS /səˈlestʃəl/

of or relating to the sky

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

ChangesnounUS /ˈtʃeɪndʒəz/

plural of “change” — an event that occurs when something passes from one state or phase to another

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

clearverbUS /klɪr/

rid of obstructions

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

considerableadjectiveUS /kənˈsɪdərəbəl/

large or relatively large in number or amount or extent or degree

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

constantadjectiveUS /ˈkɑːnstənt/

unvarying in nature

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

constantlyadverbUS /ˈkɑːnstəntli/

without variation or change, in every case

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

describeverbUS /dɪˈskraɪb/

give a description of

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

directionsnounUS /dərˈekʃənz/

plural of “direction” — a line leading to a place or point

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

distancenounUS /ˈdɪstəns/

the property created by the space between two objects or points

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

eachdeterminerUS /iːtʃ/

every one of two or more people or things, taken separately

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

EarlyadjectiveUS /ˈɜːrli/

at or near the beginning of a period of time or course of events or before the usual or expected time

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

eclipsesnounUS /ɪˈklɪpsɪz/

plural of “eclipse” — one celestial body obscures another

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

eveningnounUS /ˈiːvnɪŋ/

the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

forprepositionUS /fɔːr/

intended to be given to, or used by, somebody

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

frequentverbUS /ˈfriːkwənt/

do one's shopping at; do business with; be a customer or client of

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

FROMprepositionUS /frʌm/

showing where something starts, or who sent it

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

GRAVITATIONnounUS /ˌɡrævɪˈteɪʃən/

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

haveauxiliary verbUS /hæv/

used with a past participle to form the perfect tenses

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

IpronounUS /aɪ/

the person speaking or writing, as the subject of the verb

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

idealadjectiveUS /aɪˈdiːl/

conforming to an ultimate standard of perfection or excellence; embodying an ideal

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

INprepositionUS /ɪn/

inside something, or within a place, period, or state

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

interestingadjectiveUS /ˈɪntrəstɪŋ/

arousing or holding the attention

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

isauxiliary verbUS /ɪz/

the form of “be” used with he, she, it, or a singular noun

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

itsdeterminerUS /ɪts/

belonging to the thing or animal already mentioned

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

LESSONnounUS /ˈlesən/

a unit of instruction

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

liveverbUS /laɪv/

be an inhabitant of or reside in

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

lookedverbUS /lʊkt/

past form of “look” — perceive with attention; direct one's gaze towards

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

M'ALLISTER

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

MARSnounUS /mɑːrz/

a small reddish planet that is the 4th from the sun and is periodically visible to the naked eye; minerals rich in iron cover its surface and are responsible for its characteristic color

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

MartiannounUS /ˈmɑːrʃən/

imaginary people who live on the planet Mars

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

Merna

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

moonsnounUS /muːnz/

plural of “moon” — the natural satellite of the Earth

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

mostadverbUS /moʊst/

used to form the superlative

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

moveverbUS /muːv/

change location; move, travel, or proceed, also metaphorically

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

movementsnounUS /ˈmuːvmənts/

plural of “movement” — a change of position that does not entail a change of location

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

nearlyadverbUS /ˈnɪrli/

(of actions or states) slightly short of or not quite accomplished; all but

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

nowadverbUS /naʊ/

in the historical present; at this point in the narration of a series of past events

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

observationsnounUS /ˌɑːbzərˈveɪʃənz/

plural of “observation” — the act of making and recording a measurement

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

observedadjectiveUS /əbˈzɜːrvd/

discovered or determined by scientific observation

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

occultations

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

occurringverbUS /əˈkɜːrɪŋ/

inflected form of “occur” — come to pass

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

onepronounUS /wʌn/

used to mean any person in general, including the speaker

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

opportunitiesnounUS /ˌɑːpərˈtuːnətiz/

plural of “opportunity” — a possibility due to a favorable combination of circumstances

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

oppositeadjectiveUS /ˈɑːpəzət/

being directly across from each other; facing

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

otheradjectiveUS /ˈʌðər/

not the same one or ones already mentioned or implied

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

ourdeterminerUS /ˈaʊər/

belonging to the speaker and others

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

outadjectiveUS /aʊt/

not allowed to continue to bat or run

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

phasesnounUS /ˈfeɪzəz/

plural of “phase” — any distinct time period in a sequence of events

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

PHENOMENAnounUS /fəˈnɑːmənə/

plural of “phenomenon” — any state or process known through the senses rather than by intuition or reasoning

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

PhobosnounUS /ˈfoʊboʊs/

the larger of the two satellites of Mars

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

planetnounUS /ˈplænət/

(astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

PRACTICALadjectiveUS /ˈpræktəkəl/

concerned with actual use or practice

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

pureadjectiveUS /pjʊr/

free of extraneous elements of any kind

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

rapidadjectiveUS /ˈræpəd/

done or occurring in a brief period of time

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

rapidlyadverbUS /ˈræpədli/

with speed

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

reallyadverbUS /ˈrɪli/

in accordance with truth or fact or reality

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

RECEIVESverbUS /rəˈsiːvz/

third-person singular of “receive” — get something; come into possession of

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

resultnounUS /rɪˈzʌlt/

a phenomenon that follows and is caused by some previous phenomenon

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

satellitesnounUS /ˈsætəlaɪts/

plural of “satellite” — man-made equipment that orbits around the earth or the moon

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

sawverbUS /sɔː/

cut with a saw

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

SEENverbUS /siːn/

inflected form of “see” — perceive by sight or have the power to perceive by sight

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

severaladjectiveUS /ˈsevrəl/

(used with count nouns) of an indefinite number more than 2 or 3 but not many

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

shiningadjectiveUS /ˈʃaɪnɪŋ/

marked by exceptional merit

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

skiesnounUS /skaɪz/

plural of “sky” — the atmosphere and outer space as viewed from the earth

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

skynounUS /skaɪ/

the atmosphere and outer space as viewed from the earth

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

soconjunctionUS /soʊ/

for that reason; with the result that

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

somethingpronounUS /ˈsʌmθɪŋ/

a thing, without saying which

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

starsnounUS /stɑːrz/

plural of “star” — (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

successionnounUS /səkˈseʃən/

a following of one thing after another in time

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

thedeterminerUS /ðə/

used before a noun that is already known, already mentioned, or the only one of its kind

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

thereadverbUS /ðer/

in or at that place or location

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

thesedeterminerUS /ðiːz/

the plural of “this”: the people or things near, or just mentioned

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

thinadjectiveUS /θɪn/

Having little thickness or extent.

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

toparticleUS /tuː/

used before the base form of a verb to make the infinitive

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

transitsnounUS /ˈtrænzɪts/

plural of “transit” — a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod

From this reading Changes in the phases of the two moons, eclipses, occultations, transits, &c., are constantly occurring, so there is nearly always something to attract our attention to the Martian sky.

twonounUS /tuː/

the cardinal number that is the sum of one and one or a numeral representing this number

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

upadjectiveUS /ʌp/

being or moving higher in position or greater in some value; being above a former position or level

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

veryadjectiveUS /ˈveri/

precisely as stated

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

WepronounUS /wiː/

the speaker together with one or more other people

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

wereauxiliary verbUS /wɜːr/

the past form of “be” used with you, we, they, or a plural noun

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

whatpronounUS /wʌt/

used to ask for information about something

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

whenconjunctionUS /wen/

at the time that

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

whichpronounUS /wɪtʃ/

used to introduce a clause giving more about a thing just mentioned

From this reading Besides these advantages, the rapid movements of the two satellites of the planet result in a constant succession of celestial phenomena which afford very frequent opportunities for most interesting observations.

willmodal verbUS /wɪl/

used to talk about the future, or about willingness

From this reading We have already seen several of these phenomena, and I will now describe what we have observed.

withprepositionUS /wɪð/

in the company of; together with

From this reading Early one evening when we were out with Merna, we looked up at the sky and saw the two moons a considerable distance apart, but approaching each other from opposite directions, Phobos appearing to move very rapidly.

worldnounUS /wɜːrld/

everything that exists anywhere

From this reading CELESTIAL PHENOMENA SEEN FROM MARS--M'ALLISTER RECEIVES A PRACTICAL LESSON IN GRAVITATION Mars is really an ideal world for an astronomer to live in, its skies being so clear, the air so thin and pure, and the stars shining so brilliantly.

Chapter 23 of To Mars via the Moon: An Astronomical Story by Mark Wicks holds 103 sentences, grouped into 21 reading sections of at most 5 sentences. The text is the source edition, unabridged, and the chapter records which sentences cover which part of the work so that nothing is dropped. Every word can be tapped for its pronunciation and dictionary entry.

What does chapter 23 of To Mars via the Moon: An Astronomical Story contain?

Chapter 23 holds 103 sentences of To Mars via the Moon: An Astronomical Story, unabridged, divided into 21 reading sections.

This page carries chapter 23 of To Mars via the Moon: An Astronomical Story by Mark Wicks exactly as it stands in the source edition, without abridgement. It runs to 103 sentences, grouped into 21 sections of at most 5 sentences so that a reader can take the chapter in steady, finishable pieces. The chapter also stores a coverage record mapping every one of its sentences to a part of the work, which is how the edition demonstrates that no line was dropped.

How do I study chapter 23 of To Mars via the Moon: An Astronomical Story?

Work through the 21 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 21 sections in this chapter is short enough to read once, hear once, and then re-read with the vocabulary in view. Tapping a word plays it alone and opens its dictionary entry with IPA, part of speech and meaning, so the reader is never forced to guess a pronunciation from spelling. Working section by section keeps a long chapter from becoming an undifferentiated wall of text, which is the usual reason a reader abandons a work of this period.

Can chapter 23 be read aloud to me?

Yes — every sentence and every individual word in chapter 23 can be played aloud in United States English.

Audio covers the whole chapter: any sentence can be played, and any single word within it can be played on its own. The voice uses United States English. For a work of this period that matters, because spelling is an unreliable guide to pronunciation for vocabulary that has fallen out of daily use, and a learner who guesses wrong tends to keep the error. Hearing the word in its own sentence, and then alone, settles it.

Questions about reading To Mars via the Moon: An Astronomical Story

Common questions about reading To Mars via the Moon: An Astronomical Story by Mark Wicks on this page, its source edition and its audio.

Is this the complete text of To Mars via the Moon: An Astronomical Story?

Yes. All 2590 sentences of Project Gutenberg eBook #27633 are kept, with a record of which sentences cover which part.

Which edition of To Mars via the Moon: An Astronomical Story is used?

Project Gutenberg eBook #27633, unabridged. The Project Gutenberg header, footer and licence are removed.

How long does To Mars via the Moon: An Astronomical Story take to read?

About 215 minutes of reading across 518 sections of 5 sentences each, at an unhurried pace.

How to read To Mars via the Moon: An Astronomical Story section by section

How to work through To Mars via the Moon: An Astronomical Story section by section, using the audio and the tap-to-define vocabulary.

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Vocabulary met early in To Mars via the Moon: An Astronomical Story

Words and structures a reader meets early in To Mars via the Moon: An Astronomical Story, each tappable for pronunciation and meaning.

Astronomy
A word that appears in the opening chapter of To Mars via the Moon: An Astronomical Story; the reader can tap it to hear it and see its dictionary entry.
Eventually
A word that appears in the opening chapter of To Mars via the Moon: An Astronomical Story; the reader can tap it to hear it and see its dictionary entry.
Chief
A word that appears in the opening chapter of To Mars via the Moon: An Astronomical Story; the reader can tap it to hear it and see its dictionary entry.
Educator
A word that appears in the opening chapter of To Mars via the Moon: An Astronomical Story; the reader can tap it to hear it and see its dictionary entry.