The stars are much smaller. The sky is much darker at night. The stars are much farther away. The moon blocks out most starlight.
I gave my students this multiple choice question: From Earth, we see the sun in the day sky and other stars in the night sky. Nighttime stars look like tiny points of light. Which statement explains why nighttime stars appear so much smaller than the sun?

Only one answer is correct among these 4 choices:
- The stars are much smaller.
- The sky is much darker at night.
- The stars are much farther away.
- The moon blocks out most starlight.

Could you tell me which one is correct?

The stars are much farther away.