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The Galaxy

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by

Wesley Seller

on 6 May 2014

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Transcript of The Galaxy

The Galaxy


http://science.nationalgeographic.com/science/space/universe/galaxies-article/
http://amazing-space.stsci.edu/resources/explorations/groundup/lesson/glossary/term-full.php?t=galaxy
http://www.funtrivia.com/askft/Question21541.html
http://www.dailygalaxy.com/my_weblog/2013/03/an-infinity-of-dwarfs-a-visible-universe-of-7-trillion-dwarf-galaxies.html
http://csep10.phys.utk.edu/astr162/lect/milkyway/components.html
http://csep10.phys.utk.edu/astr162/lect/milkyway/components.html
http://www.universetoday.com/30534/what-is-a-galaxy/
http://cas.sdss.org/dr7/en/astro/galaxies/galaxies.asp
Sources
Collection of stars, gas and dust put together by gravity
4.3 light-years away
About 100 billion to 200 billion galaxies
http://dsc.discovery.com/tv-shows/other-shows/videos/how-the-universe-works-family-of-galaxies.htm
What exactly is a galaxy?
there's no verification on what a galaxy
there are five or so stars a group and a hundred or more a cluster
Milky Way is a spiral galaxy
measures about 100,000 light-years
is thought to contain 200-400 billion stars.
Flat disk with a budging center
Like our galaxy The Milky Way
Has three components:
Disk
Halo
Nucleus




Spiral Galaxy
They are circular but stretch long
The world's largest galaxies are Elliptical
Contain many older stars
Elliptical Galaxies
This contains many random shapes
Contains large amount of gas and dust
They account for only a small percentage of known galaxies
Irregulars Galaxies
Full transcript