Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation (a) an extremely large elliptical galaxy with a lookback time of 13 billion years, (b) a small irregular galaxy at a distance of 10 million light-years from Earth, (c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium, (d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center, (e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

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Answer 1

Question

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

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Answer 2

Question

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

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Answer 3

Question

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

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Answer 4

Question

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

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Answer 5

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

Answer 6

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

Answer 7

Chapter 21, Problem 37EAP

To determine

Ranking the following in the order from easiest to most difficult to explain in terms of current ideas about galaxies’ formation and evolution through discussion involving scribing, advocating, skepticism and moderation

(a) an extremely large elliptical galaxy with a lookback time of 13 billion years,

(b) a small irregular galaxy at a distance of 10 million light-years from Earth,

(c) a large spiral galaxy, 20 million light-years from Earth, consisting entirely of stars made only of hydrogen and helium,

(d) a small spiral galaxy, 5 million light-years from Earth, with one of the most massive black holes ever discovered at its center,

(e) a spiral galaxy approximately the size of the Milky Way with a lookback time of 13 billion years.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 21 - Prob. 1VSC Ch. 21 - Prob. 2VSC Ch. 21 - Prob. 3VSC Ch. 21 - Prob. 4VSC Ch. 21 - Prob. 1EAP Ch. 21 - Prob. 2EAP Ch. 21 - Prob. 3EAP Ch. 21 - Prob. 4EAP Ch. 21 - Prob. 5EAP Ch. 21 - Prob. 6EAP

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