Life Cycle of a Star.

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Presentation transcript:

Life Cycle of a Star

Nebula Baby star Composed of gas and dust

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

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

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

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

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

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 **

Draw the Bohr models for: Helium Carbon Sulfur

Nebula Baby star Composed of gas and dust

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

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

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

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

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

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

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

Draw and Copy

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