Question

the following question has two parts. first, answer part a. then, answer part b.
part a
the picture shows the position of four stars relative to earth’s axis and equator.
image of earth with four stars labeled 1, 2, 3, 4 around it
when viewed from the northern hemisphere, which star appears to stay in the same place in the sky throughout the night?
a 1
b 2
c 3
d 4
part b
what causes some stars to appear to stay in the same place, while other stars appear to move across the sky throughout a single night?
a earth rotates on its axis.
b earth revolves around the sun.
c half of earth faces away from the sun at all times.
d the length of daytime changes as the seasons change

Explanation:

Part A

In the Northern Hemisphere, the star near the Earth's axis (North Celestial Pole) appears stationary. Star 2 is likely aligned with Earth's axis, so it stays in place.

Earth's rotation on its axis causes stars to seem to move across the sky, but stars near the axis (like the North Star) appear stationary. Rotation (not revolution, which is yearly) causes nightly star motion.

Answer:

B. 2

Part B