Transcript jackie822 beanerbutt777 life cycle of a star

Life Cycle of A Star
By Jackie822
and
Beanerbutt777
The Life Cycle of
Small and Medium Sized
Stars
The First Stage: The Nebula
An
The nebula is a cloud of gas and dust. It is not yet a star.
http://rigel.csi.cuny.edu/rowan/lectures/Hubble%20Nebulae_files/HelixNebula-HST.jpg
The Protostar
http://www.williamsclass.com/EighthScienceWork/ImagesEighth/Protostar.jpg
Brown Dwarf
A brown dwarf occurs if the protostar is too small to ignite fusion.
http://chandra.harvard.edu/photo/2003/twa5b/twa5b_dwarf_ill.jpg
Main Sequence
A protostar gets enough mass to ignite fusion. All main sequence
stars fuse hydrogen. Stars spend most of their life in the main
sequence stage.
http://www.astronomyexpert.co.uk/images/9392.jpg
Red Giant
A red giant is formed when a small to medium sequence star runs out of hydrogen and begins
fusing helium.
http://home.comcast.net/~van.etten/Support/Red%20Giant.jpg
Planetary Nebula
A red giant completely stops fusing helium and the outer layers of the star are
driven away.
http://rigel.csi.cuny.edu/rowan/lectures/Hubble%20Nebulae_files/HelixNebula-HST.jpg
White Dwarf
White Dwarf
The white dwarf
is the leftover
core of a star. It is
extremely dense.
It may be the size
the earth but has
half the weight
of the sun.
http://www.nasa.gov/centers/goddard/images/content/207358main_whitedwarf_20080102_HI1.jpg
Black Dwarf
A white dwarf cools off after trillions of years and eventually stops emitting light.
http://library.thinkquest.org/3103/nonshocked/topics/blackdwarfs/images/blackdwarfimg.gif
The Life Cycle Of
Massive Stars
The Nebula is a cloud of
dust and gas.
The Nebula
http://rigel.csi.cuny.edu/rowan/lectures/Hubble%20Nebulae_files/HelixNebula-HST.jpg
Protostar
http://rigel.csi.cuny.edu/rowan/lectures/Hubble%20Nebulae_files/HelixNebula-HST.jpg
Massive Main Sequence
Massive main sequence stars burn more quickly than small to medium mass main sequence
stars because they fuse more hydrogen.
https://segue.atlas.uiuc.edu/uploads/ryemm2/blue%20main%20sequence.jpg
RedRed
SUPERGIANT
Super Giant
http://solarsystem.nasa.gov/multimedia/gallery/prominence.gif
Red Super
giants occur
when massive
main sequence
stars run out of
hydrogen and
start fusing
helium, carbon,
oxygen, etc.
SUPERNOVA!
When fusion stops, the star collapses and creates a huge
explosion.
http://d21c.com/sookietex/space_supernova.jpg
Neutron Star
The super
dense core
left over
after a
supernova is
called a
neutron star.
http://media.arstechnica.com/journals/science.media/neutron_star.jpg
Black Hole
BLACK
HOLE
Stars with masses 25-50
times the mass of the
sun form a black hole
after the supernova.
Other stars turn into
Neutron Stars. Nobody
knows what happens to
things after they go into
a black hole.
http://startswithabang.com/wp-content/uploads/2008/05/ashtekar_blackhole.jpg
The End.