Life Cycle of a Star.

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Presentation transcript:

Life Cycle of a Star

Stage 1 Protostars

Protostars Huge clouds of gas (hydrogen) in which stars are made. Many thousands of times bigger than our solar system As the clouds collapse stars are born in them

Stage 2 Main sequence star

Main Sequence Star E.g. Our sun Sequence lasts for about 10 billion years Our sun is about half way through it’s main sequence

Stage 3 Red Giant

Red Giant As the sun runs out of hydrogen the outer layers of the sun will become cooler They will also expand massively. The Earth (along with Mercury, Venus and Mars) will be swallowed up.

Stage 4 White Dwarf

White Dwarf Gravity will cause the red giant to collapse The sun is now much cooler and it collapses into a small white star It still has the same mass as the original sun!

Stage 5 Black Dwarf

Black Dwarf The sun cools more and more Eventually it will become a black mass emitting no light It will then spend the rest of eternity drifting silently through space

Stars bigger than our Sun! At least four times bigger

Stage 4 (for a big star) Red Supergiant

Stage 5 (for a big star) Supernova

Supernova! The largest and most powerful explosions in the universe. The red supergiants literally blow themselves apart!

Supernova All the atoms we are made from came originally from these giant supernova explosions.

Stage 6 (for a big star) Black hole

Black hole After the supernova a huge mass is left behind. There is so much mass its gravity prevents even light from leaving it Black holes can suck in nearby stars and solar systems.

Luckily there are no black holes any where near our sun!