1. Life Cycle of a Star

3. Nebula
Baby star
Composed of gas and dust

4. Protostar Center of nebula begins to shrink as it gets hotter
Nuclear fusion begins

5. Main Sequence “Middle Age”
Star will spend most of its life in this stage

6. Red Giant Star starts to die It expands 1,000 times its original size
No more nuclear fusion (no more hydrogen)
Fun Fact: Our Sun will expand 400x its current size

7. Planetary Nebula
Star blows off its outer layer of ionized gases off into space

8. White Dwarf
Gravity crushes the matter into small planet-sized body of immense density
VERY BRIGHT

9. Black Dwarf
Dead Star
Ball of gas not capable of nuclear fusion within its core
**Theoretical: The universe is not old enough for the first white dwarf to have burned out **

10. Draw the Bohr models for:
Helium
Carbon
Sulfur

12. Nebula
Baby star
Composed of gas and dust

13. Protostar Center of nebula begins to shrink as it gets hotter
Nuclear fusion begins

14. Main Sequence “Middle Age”
Star will spend most of its life in this stage

15. Red Supergiant MORE mass = MORE hydrogen = MORE energy
Run out of Hydrogen faster (larger)

16. Supernova Violent death of high mass star
Occur when nuclear fusion can no longer produce heat required for equilibrium
Star collapses and then EXPLODES

17. Neutron Star Very dense
Collapsed core of supernova is 2x the size of the sun
Shrinks to 20 km in size with the density of 1 tsp weighing 100 million metric tons

18. Black Hole Collapsed supernova core is 3x more massive than the sun
Incredibly dense object
Gravity is so strong that not even visible light can escape from it

19. Our sun will not explode! It is not a massive star
Remember….
Our sun will not explode! It is not a massive star

20. Draw and Copy