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Dying Stage of a Star

Supernova, white dwarf, planetary nebula

Aivy Lam

on 20 April 2016

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Transcript of Dying Stage of a Star

Aivy, Molly, Brandi

a Star

Red Giants/Super Giants
Planetary Nebula
White Dwarf
Supernova Type 2
-Stars run out of nuclear fuel
-Swollen Stars
- turn red when cooled
- Depending on the size
- Red Giant
- Red Super Giant
- Low Mass Stars (like the Sun)
- Outer Layers of the White Dwarf
- expanding shell of gas
- the increased number of photons flowing outward from
the star's hot, compressed core will push on the carbon
and silicon grains that have formed in the star's cool
outer layers to eject the outer layers
- Massive Stars
- the brightness of 10 billion suns
- sufficient pressure and temperature at the core to do what
it takes to continue fusing the newly minted atoms they formed earlier.
- keep the star briefly stable until its core becomes iron
- core will collapse:
- neutron star \
- black hole /
- White Dwarf will cool to a Black Dwarf
- Black Dwarf emits zero energy
- However, the universe's oldest stars are only
10 billion - 20 billion years old, there are no known
black dwarfs—yet.
- Supernova type 2
- Neutron Star
- Black Hole



H-R Diagram
- burned up all of the hydrogen it once used as nuclear fuel.
- the core has a mass less than 1.4 solar masses
- gravity starts to take effect.
- the star compacts/ collapse
- becomes a highly dense
- size of earth
- electrons will prevent further collapse of the core
- it will cool until it becomes a Black Dwarf
Neutron Star
- remainder pieces of the massive star
-very dense, because the violence of the star's
death has compressed them until electrons and
protons have merged to become neutrons.
Black Hole
- The collapsed remnant of a star
- gravity is so great that nothing, not even light,
can escape it.
- the velocity around it is faster than light
- a region of space where gravity has warped space-time
so much that straight lines have become circles.
rest creates a huge explosion

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