Question

1. why do stars appear in different parts of the sky during different months?
2. what is a circumpolar star?

Explanation:

Question 2:

The Earth's revolution around the Sun (orbital motion) and its rotation on its axis cause the apparent position of stars to change over months. As Earth moves in its orbit, our perspective of the night sky shifts, revealing different star groups (constellations) at different times. Also, Earth's rotation makes stars appear to move daily, but the orbital motion creates the long - term (monthly) shift in their visible positions.

A circumpolar star is a star that never sets below the horizon as viewed from a particular location on Earth. This is because its angular distance from the celestial pole (either the North or South Celestial Pole) is less than the observer's latitude (in the case of the Northern Hemisphere for stars near the North Celestial Pole, and vice - versa for the Southern Hemisphere). So, as the Earth rotates, these stars circle around the celestial pole and remain visible above the horizon at all times (for that location).

Answer:

Stars appear in different parts of the sky during different months because of the Earth's revolution around the Sun (which changes our perspective of the night sky over time) and its rotation on its axis (which causes the daily apparent motion of stars, and the orbital motion leads to the long - term, monthly change in their visible positions).

Question 3: