- Earth is a kind of celestial object
- A star is a kind of celestial object / celestial body
- Apparent motion is when an object appears to move relative to another object 's position
- So, apparent motion of stars is when stars appear to move relative to earth's position

- Apparent motion of stars is when stars appear to move relative to earth's position
- The earth rotating on its axis causes stars to appear to move across the sky at night
- So, the earth rotating on its axis causes apparent motion of stars

- The earth rotating on its axis causes apparent motion of stars
- Stars appear to move relative to the horizon during the night
- So, the earth rotating on its axis causes stars to move relative to the horizon during the night

Therefore, the earth rotating on its axis causes stars to move relative to the horizon during the night
Question
How does the appearance of a constellation change during the night?

Context
- Earth is a kind of celestial object 
- Stars appear to move relative to the horizon during the night 
- A star is a kind of celestial object / celestial body 
- The earth rotating on its axis causes stars to appear to move across the sky at night 
- Apparent motion is when an object appears to move relative to another object 's position