•Low mass stars•High mass stars

nebula

A star begins it’s life in a cloud of dust and gas mainly hydrogen, its called a nebula.

Gravity then begins to pull all the gas and dust toward the center of the nebula.

Once this happens a proto star begins to form.

http://en.wikipedia.org/wiki/File:Omega_Nebula.jpg

Proto star

A proto star is a basically a baby version of a star.

This is the stage when it ignites itself by fusing hydrogen atoms.

Eventually the star gets hotter and begins to enter it’s main sequence phase.

http://www.cwanswers.com/8921/protostar

BROWN DWARF

A brown dwarf is a star that never got hot enough to start fission.

Its basically a failed star, usually a brown dwarf is formed after the proto star phase.

If a star gains enough heat it ignites itself.

http://astro.berkeley.edu/~basri/bdwarfs/index.html

(LOW MASS STARS) MAIN SEQUENCE

The proto star gains enough mass to begin fusion, and starts its main sequence.

http://astro.berkeley.edu/~basri/bdwarfs/index.html

red giant

This is what happens when Star runs out of hydrogenAnd starts fusing helium atoms which gives it the Bright red color.When this happens in billions Of years if there are still Humans, all life will be fried.

http://en.wikipedia.org/wiki/Red_giant

PLANETARY NEBULA

This is the stage when a red giant stops fusing helium and pushes the outer layers of itself outward a shown in the picture. When this happens all that is left is a solid dense core. At this point all life on earth would have been annihilated a long time ago during the Red Giant phase.

http

://en

.wikip

edia

.org

/wiki/

white DWARF

This is basically the stars old form, the star is slowly dying out.

A white dwarf is the left over dense core Of the old star. White dwarfs are still hot (don’t touch)

http://en.wikipedia.org/wiki/

Black dwarf

A black dwarf is the cooled version of a White Dwarf

There none in our universe because it takes trillions of years for a white dwarf to cool down because our universe is only 13 billion years old!

http://en.wikipedia.org/wiki/Black_dwarf

Life cycle of high mass stars

NEBULA

A star begins it’s life in a cloud of dust and gas mainly hydrogen, its called a nebula.

Gravity then begins to pull all the gas and dust toward the center of the nebula.

Once this happens a proto star begins to form.

Proto star

A proto star is a basically a baby version of a star.This is the stage when it ignites itself by fusing hydrogen atoms.Eventually the star gets hotter and begins to enter it’s main sequence phase.

http://www.cwanswers.com/8921/protostar

High MASS STARS MAIN SEQUENCE This is the main

sequence phase of a high mass star.

The heat generated from a high star can is so hot that if our sun was a high mass star we would fry.

High mass stars are also blue.

http://en.wikipedia.org/wiki/File:1e9m_comparison.png

Red supergiant

A red supergiant is the next phase of a high mass star’s lifecycle.

This phase is huge, our planet would be a grain of sand compared to a red supergiant.

http://commons.wikimedia.org/wiki/File:Betelgeuse_viewed_from_8au.jpg

supernova

This is the phase when a red supergiant stops fusing hydrogen and starts fusing heavier objects until it explodes .It’s explosion is the biggest and brightest explosion ever seen.

Black hole This is the phase of the star

where gravity sucks the star inward, and not even light can escape a black hole.

Some people think that a black hole can lead to another dimension or another universe, sounds cool right ? Well no its not cool because if you ever get caught in one you would be stretched out and you probably would die.

or

Neutron star

A neutron star is the result of a supernova.

It is very hot and dense.

It’s the densest thing we know.

http://en.wikipedia.org/wiki/File:123107main_image_feature_371_ys_4.jpg

The end

If you are still watching you have no life

UM your still here go away

Stop skipping class losers