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Nebulas
By Blaine Vrvilo
Description
Nebulas are clouds of dust and gasses that
form between stars. They form in regions
where gas, dust, and other materials clump
together to create larger masses, which then
gather other material until they become big
enough to be known as stars.
Emission Nebulae
Emission nebulae emit red or pink light. The
light is actually extra energy being emitted in
the form of light.
Reflection Nebulae
Reflection nebulae shine with a blue light,
which is reflected from stars around it. They
are blue because, they scatter the blue light
from nearby stars while the rest of the colors
are allowed to pass through the cloud.
Planetary Nebulae
A planetary nebulae is formed when a sun
sized star begins to die, and sheds its outer
layers. These nebulas are only visible for
around 50,000 years, until they eventually mix
into outer space and become to thin to see.
Bok Globule
Bok globules are extremely dense and actually
block all of the light behind them.
Geology
Nebulas form stars which supplies energy to
planets providing the possibility of life.
Bibliography
http://www.kidsastronomy.com/nebulae.htm
http://www.star.le.ac.uk/edu/twn/types.html
Objsam.wordpress.com/2008/04/17/nebula/
www.astronet.ru/db/xware/msg/1216768
www.nasaimages.org/luna/servlet/detail/nasa
www.sdss.org/iotw/archive.html