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30 votes
30 votes
What causes the apparent motions of stars across the sky each night

A. earth revolves around the sun.
B. earth spins on its axis
C. the stars move around the sun and earth.
B. the sun and earth revolve around the stars

User Mitnk
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2 Answers

16 votes
16 votes

Answer:

b earth spins on its axis

Step-by-step explanation:

User Shivangi Singh
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3.1k points
12 votes
12 votes

Answer:

B

Step-by-step explanation:

for the motion every night, it is because the Earth spins on its axis.

for the changes over a year, this is because the Earth rotates around the sun.

for the changes over hundreds, thousands or millions of years, this is because the whole solar system (including the Earth, of course) rotates with all the other stars in our galaxy around the center of the galaxy. and each star system has its own orbit (similar to the planets in our solar system).

it is very rare to see objects outside of our galaxy without a telescope, but they change too over a long period of time, because our galaxy not only rotates by also moves through the universe, and these other objects move on their own too.

User Alfonso De La Osa
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2.1k points