The life cycle of stars
- Created by: maddy8488
- Created on: 16-02-14 12:04
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- Life cycle of stars
- Protostar
- Main sequence star
- Protostar
- Red super giant
- Main sequence star
- Supernova
- Main sequence star
- Red giant
- Stars around the same size as the sun.
- white dwarf
- Red giant
- Stars around the same size as the sun.
- Red giant
- Supernova
- Neuron star...
- ... or Black hole
- Neuron star...
- Neuron star...
- Stars start to form from clouds of dust and gas. Gravity make the dust and gas to spiral in to form a protostar
- Nuclear fusion cause hydrogen nuclei to form helium nuclei creating heat and light. smaller masses pull together to form planets which orbit the star.
- In it's stable period it's called a Main sequence star and it lasts several billions of years
- When hydrogen runs out. heavier elements such as iron are made by nuclear fusion.
- Stars much bigger than the sun.
- Red super giant
- Red super giant
- When it becomes unstable it ejects its outer layer of dust and gas as a Planetary Nebula.
- This leaves a hot dense solid core (White dwarf) which cools to from a black dwarf then disappears.
- white dwarf
- white dwarf
- They expand and contract several times while undergoing more fusion forming elements as heavy as iron. eventually they explode in a Supernova making even heavier elements and ejecting them into the universe.
- Exploding Supernovas throws the outer layers of dust and gas into space levying a ver dens core (Neutron star). If the star is big enough it will be come a Black hole.
- ... or Black hole
- ... or Black hole
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