<human>: What are the most common questions about astronomy?
<bot>: 
1. What is the distance between Earth and the Moon?
2. How many planets are there in our solar system?
3. What is the name of the brightest star in the sky?
4. What is the difference between a constellation and a zodiac sign?
5. What is the best way to observe the night sky?
6. What is the oldest known civilization on Earth?
7. What is the name of the largest crater on Mars?
8. What is the name of the galaxy that contains our sun?