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Types of Galaxies
Chapter 12, section 3
7
Astronomy
8th Grade
01/04/2016
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Term
galaxy
(12-3)
 Definition
massive system of billions of stars, dust, and gas held together by gravity
Term
spiral galaxy
(12-3)
 Definition
relatively flat with a center bulge and "arms" spiraling out
Term
elliptical galaxy
(12-3)
 Definition
have an oval shape
Term
irregular galaxy
(12-3)
 Definition
a galaxy that is neither elliptical nor spiral
Term
randomly
(12-3)
 Definition
lacking a definite plan or pattern
Term
Milky Way
(12-3)
 Definition
a spiral galaxy where our solar system is located
Term
Big Bang Theory
(12-3)
 Definition
the idea that the entire universe began and expanded out of a tiny, really hot point
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