1. What is the fate of the sun and other stars??
Stellar Evolution
What is the fate of the sun
and other stars??

2. Formation of Stars
Begins with interstellar gas and dust called a nebula
Collapses on self as a result of gravity
Rotates and flattens with hot condensed object at center called a protostar

3. When temperature becomes hot enough for nuclear fusion to occur Hydrogen (H) and Helium (He) are the first reaction.

4. Lifecycle of a Medium Star
10 % of a stars innermost mass react in nuclear fusion
When H in core is gone, some left in outer layers
Outer layers expand and cool; star becomes a Red Giant

5. Red giants have low surface gravity, outer layers are driven away
Core becomes hot enough to produce Carbon (C)
Star contracts to normal size when helium is used up
Carbon core left over, White dwarf remains

6. Lifecycle of Massive Stars
Massive stars undergo many reactions and produce many elements
Cannot support themselves and violently collapse on themselves

7. Neutron Star – Collapse dense core of a star that forms quickly while its outer layers are falling inward
Supernova – Massive explosion that occurs when the outer layer of a star are blown off

8. Black Hole – Small, extremely dense remnant of a star whose gravity is so immense that even light can not escape its gravity field