CAV'S

1. Light moves pretty fast. How far can it travel in two years? (in km) 20 trillion km.

2. How far can light travel in 3 years? (in km) 30 trillion km

3. Why do we call it a light year? What does it have to do with "light" and a "year?" A light-year is a unit of distance. It is the distance that light can travel in one year.

4. Which three stars are closest to Earth? The Sun, Proxima, Alpha centauri

5. Which

6. Draw a simple HR Diagram. Label the X-axis in terms of hot and cold, and the y-axis in terms of bright and dim. i will turn this in on another paper

7. Label the main sequence, Sun, red giants, white dwarfs, and black dwarfs. is larger: 1 light year or 1 AU? Light year

8. Scroll down to the first colorful HR Diagram. Is Rigel or Sirius hotter? Which one is brighter? Rigel is hotter and larger

9. What percentage of stars on this diagram are colder than the Sun? Brighter? 31%

10. If we can't see black holes, how can we detect that they're even there? because the light bends

11. Can we see the event horizon of a black hole? No we are not able

12. What would it look like if you were to watch someone else fall into a black hole. Please include details of what you would see. If i saw mr. dunn fall in it would be so fast i would not see him he would be crushed

13. Why do pulsars pulsate?