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Evolution Of Stars:

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by

christian vasquez

on 20 February 2014

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Transcript of Evolution Of Stars:

Nebula
A nebula is the very first stage in a stars life.
It's made of clouds, dust, helium, and other gasses
Nebula is latin for "Cloud-Library"
gravity causes the nebula to begin to collapse in on itself. As the dust and gas come together, they begin to heat up. Eventually, the matter becomes so dense and hot that it forms a Protostar.
Protostar
A Protostar is the second part of a stars life.
A protostar is a large mass that forms by contraction out of the gas of a giant cloud in the medium
In about 100,000 years the protostar reaches 10 million degees forming nuclear energy.
Main Sequence
Main Sequence if the third part of a stars life.
90 % of a Main Sequence star is made of nuclear energy
Once it gets hot enough it forms a Red Giant
Red Giant
A Red Giant is the 4th part of a stars life
Their size ranges from 100 million to 1 billion kilometers in diameter
Once it can no longer support itself it turns into a planetary nebula
Evolution Of Stars:
Low-Mass

Planetary Nebula
White Dwarf
Citations
A Planetary Nebula is the 5th part of a stars life
Resembles planets like Uranus
After a while it reaches its last stage. The White Dwarf
A White Dwarf is a stars 6th stage in a stars life
A White Dwarf is formed by the fusion of hydrogen after billions of years
library.thinkquest.org
universetoday.com
space.com
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