The Universe: Life & Death of a Star Key

The Universe: Life & Death of a Star Key

Forces of Gravity
1. How many stars are in our galaxy? / 400 billion in our galaxy (time stamp: 1:35)
2. What is the key component (element) found in stars? / Hydrogen (time stamp: 2:49)
3. What is a star constantly at war/fighting with? / Gravity (time stamp: 5:40)
4. In what state do stars spend most of their life cycle? (Our sun is currently in this phase) / Main sequence (time stamp: 7:22)
5. What are the most common types of stars in our universe? / Red dwarf (time stamp: 8:28)
6. This type of star has a surface temperature of 45,000 degrees F and is up to 20 times the mass of the sun. / Blue main sequence (time stamp: 9:04)
7. How long will our Sun live? / 10 billion total years (time stamp: 11:08)
5 billion years left (time stamp: 13:07)
White Dwarfs (After 2nd Intro Frame)
8. What is a white dwarf? / Stellar remnant, very dense (time stamp: 17:56)
9. Which stage of the star’s life cycle will be a white dwarf? / Final (time stamp: 18:36)
10. What can a white dwarf do to its companion star? / Steal its lifeblood (time stamp: 19:54)
All from the Stars (After 3rd intro frame)
11. Where did the elements in your body originally come from? / Long dead stars (time stamp: 26:28)
12. How big are neutron stars? / 10 miles across (time stamp: 28:15)
13. How much would a teaspoon of neutron star weigh? How much would a 150 lb. person weigh? / 1 billion tons. 10 billion tons. (time stamp: 28:52)
14. What is formed when a star finally dies and collapses? / Black hole (time stamp: 30:40)
15. Can things be sucked into black holes? Why? / No. only close objects (time stamp: 31:28)
Explosive Collisions Stars (After 4th intro frame)
16. What do these super large stars produce? / Heavy elements – Iron (time stamp: 33:56)
17. What happens when 2 neutron stars collide? What is produced? / Circle each other before collision. Energy. (time stamp: 36:35)
18. What is the chance of a collision between the sun and another star? / Billion to 1 (time stamp: 38:20)
Failed Stars (After 5th intro frame)
19. What are “blue stragglers”? / Stars younger than surrounding stars in cluster –result of two older stars colliding. (time stamp: 40:00)
20. Which types of stars are known as “failed stars” that don’t have enough mass to create energy? / Brown dwarf (time stamp: 42:07)