<human>: What are the most common questions about astrophysics?
<bot>: 
1. How do stars form and evolve?
2. What is dark matter and how does it affect galaxies?
3. How did life begin on Earth?
4. Why is there more matter than antimatter in the universe?
5. How many planets are there in our galaxy?
6. Is there intelligent life elsewhere in the universe?
7. What is the origin of cosmic rays?
8. What is the nature of black holes?
9. What is the origin of the universe?