The night sky in summer and autumn, and the southern sky

Tests: 4 of 11 right · Exam: 1 of 4 right · Kind: plain · Understood: 7 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 21 of the space course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · wrong ✗

Ella in Perth says she can see Polaris every night, just like her gran in Glasgow. Is she right?

1. Yes, but only in winter — no support
2. No, Polaris is hidden from Australia — ✓ the right answer · score 3
3. No, Polaris is only seen in summer — ← Mova's choice · score 4
4. Yes, Polaris is seen from everywhere — score 4

Why: It took the question to ask which statement is true. It chose option 3 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 19, line 5: «People have watched stars die: Chinese astronomers saw a "guest star" in 1054, a supernova blazed in 1987, and neutron stars crashing together, first seen in 2…», reached through the remembered sentence the question matched. What matched: the same action «see» (+3); the same thing acted on «guest star» (+3). Against it: a different doer (counts against) (-2). The right option, 2, scored 3. · the question and its options parsed, with trees and pragmatics

Test 2 · wrong ✗

mate says the southern sky has a south pole star like Polaris. true?

1. Yes, it's in the middle of the Southern Cross — no support
2. Yes, it's called Antares — no support
3. Yes, it's the brightest star in the sky — ← Mova's choice · score 7
4. No, there's no bright south pole star — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 3 with score 7, the only option with support. Its support: lesson 2, line 17: «Telescopes such as ALMA in Chile have photographed dusty discs around young stars where new planets are forming right now.», reached through the remembered sentence the question matched. What matched: the same doer «new planets» (+4); the same thing acted on «young stars» (+3). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

Why does Scorpius look so much higher from Sydney than from London?

1. Sydney is closer to the stars — ← Mova's choice · score 4
2. Scorpius is a different group of stars there — score 4
3. Sydney is much farther south on the round Earth — ✓ the right answer · no support
4. The air in Australia is thinner, so stars rise higher there — score 4

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 17, line 1: «The Sun is a star, quite an ordinary one: it looks so huge and bright only because it is about 270,000 times closer to us than the next nearest star.», reached through the cause of the sentence the question matched. What matched: the same circumstance (+4); the same light verb (be, have, do, get, go) (+2). Against it: a different doer (counts against) (-2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 4 · wrong ✗

You want to see the Milky Way at its brightest and thickest. Where should you look?

1. Straight down at the horizon in the north — ← Mova's choice · no support
2. Towards the Plough — no support
3. Towards Sagittarius — ✓ the right answer · no support
4. Towards the Moon — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 5 · right ✓

Which is true about the Andromeda Galaxy?

1. It is a faint smudge in autumn skies, millions of light years away — ← Mova's choice · ✓ the right answer · score 9
2. It is a bright star near Polaris — no support
3. It is a planet beyond Neptune — no support
4. It is a cloud of gas floating inside our own solar system, near Pluto — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 9, the only option with support. Its support: lesson 21, line 12: «The Andromeda Galaxy, about 2.5 million light years away, is the farthest thing most people can see with the naked eye, a faint smudge in autumn skies.», reached through the remembered sentence the question matched. What matched: the same doer «andromeda galaxy» (+4); the same thing acted on «farthest thing» (+3); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

ugh it's like 11pm in June in Inverness and it's still not dark, why

1. The Sun is closer to Earth in June — ← Mova's choice · no support
2. Street lights reflect off the low summer clouds all night — no support
3. The Moon lights the sky all June — no support
4. Near midsummer the sky up there never gets fully dark — ✓ the right answer · no support

Why: Nothing it remembers matched the question, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 7 · right ✓

In a cartoon, a boy in London points at the Southern Cross on a July night. What's wrong?

1. The Southern Cross only shows in winter — no support
2. Nothing, it is right above London every clear night — no support
3. The Southern Cross cannot be seen from Britain — ← Mova's choice · ✓ the right answer · score 2
4. The Southern Cross is visible only by day — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 2, the only option with support. Its support: lesson 21, line 4: «Picture a cousin in Sydney and you in Leeds looking up on the same night: you see the Plough, she sees the Southern Cross, because you stand on different sides…», reached through the option's own match among the sentences about the question's things. What matched: the same action «see» (+3); the same thing acted on «southern cross» (+2). Against it: one says «not», the other does not (counts against) (-3). · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

If you followed the line of stars from the corner of the Great Square of Pegasus, what would you reach?

1. Andromeda — ← Mova's choice · ✓ the right answer · no support
2. Scorpius — no support
3. Orion — no support
4. The Southern Cross — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 9 · right ✓

Jack reckons constellations are the same pictures in every culture. Is he right?

1. No, only Australians name constellations — no support
2. Yes, everyone has always used the same 88 Greek pictures in the sky — no support
3. Yes, the stars form only one possible shape — no support
4. No, peoples see different pictures, like the Emu in the Sky — ← Mova's choice · ✓ the right answer · score 2

Why: It took the question to ask which statement is true. It chose option 4 with score 2, the only option with support. Its support: lesson 21, line 5: «People everywhere have made pictures of the sky: Aboriginal Australians see an Emu in the dark dust clouds of the Milky Way.», reached through a sentence linked to the one the question matched. What matched: the same action «see» (+2); the same circumstance (+2). Against it: a different doer (counts against) (-1); a different thing acted on (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

What's the red star in Scorpius called, the one that glows like a coal

1. Altair — ← Mova's choice · no support
2. Deneb — no support
3. Vega — no support
4. Antares — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

Why don't you see the same stars in July and in October?

1. The Moon blocks half of the stars in autumn, so we see far fewer of them — ← Mova's choice · no support
2. The stars switch off in autumn — no support
3. Earth moves round the Sun, so night faces a different part of space — ✓ the right answer · no support
4. The stars swap places every season — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the three stars which together constitute the star pattern designated the Summer Triangle.

1. Antares, Altair and Rigel — ← Mova's choice · no support
2. Sirius, Procyon and Betelgeuse — no support
3. Polaris, Vega and Capella — no support
4. Vega, Deneb and Altair — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Which of the following statements most accurately characterises the visibility of the Plough and Polaris from Australia and New Zealand?

1. They are visible only at midnight — ← Mova's choice · no support
2. They are visible only in summer — no support
3. They are visible throughout the year — no support
4. They are hidden from view — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

Ascertain the means by which observers in the southern hemisphere determine the direction of due south.

1. A bright star situated precisely at the south celestial pole — no support
2. The Summer Triangle and the planet Venus — no support
3. The Plough and the star Polaris — no support
4. The long arm of the Southern Cross and the two Pointers — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 21, line 16: «There is no bright south pole star, so southern observers find south using the long arm of the Southern Cross and the two Pointers, Alpha and Beta Centauri.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «long arm» (+2); the same property (+2). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Select the response that is consistent with the established facts concerning the Andromeda Galaxy.

1. It is about 2.5 light years distant and visible only by telescope — ← Mova's choice · no support
2. It is about 2.5 million light years distant and visible to the naked eye — ✓ the right answer · no support
3. It is a cloud of gas situated within the Milky Way, near the constellation Lyra — no support
4. It is a star cluster within the solar system — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/space/21-the-night-sky-in-summer-and-autumn-and-the-southern-sky/