Presentation on theme: "What is the fate of the sun and other stars??"— Presentation transcript:
1 What is the fate of the sun and other stars?? Stellar EvolutionWhat is the fate of the sunand other stars??
2 Formation of StarsBegins with interstellar gas and dust called a nebulaCollapses on self as a result of gravityRotates 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 fusionWhen H in core is gone, some left in outer layersOuter 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 upCarbon core left over, White dwarf remains
6 Lifecycle of Massive Stars Massive stars undergo many reactions and produce many elementsCannot 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 inwardSupernova – 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