Quiz

1. How long does the moon take to go around the Earth?27 d 7 h 43.1 min Wikipedia
2. Calculate  
3. Which galaxy do we live in? Milky Way
4. Is the Sun a star? Yes
5. What is a solar spot? Dark region on the surface Wikipedia
6. How many protons are in hydrogen? 1
7. What is a light year?  distance light travels in one year
8. How old is the Universe? 13.772 ± 0.059 billion years Wikipedia
9. Which is closer, Mexico or the Andromeda Galaxy? Mexico
10. Find x:   X=