Multiple choice

As viewed from Earth, stars appear to move across the sky at night because of

  1. Earth’s revolution

  2. Earth’s rotation

  3. Both (1) and (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As viewed from Earth, stars appear to move across the sky at night because of Earth’s rotation. The stars appear to move, but it is actually just our location on Earth that is moving (West to East). Any actual motion of the stars is too small to detect because of the huge distances involved.

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