22 terms

Terms	Definitions
binary stars	star systems that have 2 stars
star systems	groups of 2 or more stars
triple stars	star systems that have 3 stars
eclipsing binary	star system in which one star periodically blocks the light from another star
open clusters	star cluster with a loose, disorganized appearance and contains no more than a few thousand stars
globular clusters	star clusters with large groupings of older stars
open clusters	star clusters with many bright supergiants and much gas and dust
globular clusters	star clusters that are round and densely packed with stars
galaxy	huge group of single stars, star systems, star clusters, dust and gas bound together by gravity
spiral galaxy	galaxy that appears to have a bulge in the middle and arms that spiral outward
elliptical galaxy	galaxy that looks like round or flattened balls
irregular galaxy	galaxy that does not have a regular shape
barred-spiral galaxy	galaxy with a huge bar-shaped region of stars and gas that passes through its center
quasar	a distant, enormously bright young galaxy with a giant black hole at its center
irregular galaxy	__________ galaxy
spiral galaxy	__________ galaxy
elliptical galaxy	____________ galaxy
Milky Way Galaxy	galaxy that our solar system is in
universe	all of space and everything in it
scientific notation	powers of 10 to write very large or very small numbers in shorter form
Andromeda Galaxy	nearest galaxy to the Milky Way
spiral	The Milky Way Galaxy is a _________ galaxy.

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• "irregular galaxy" image
• "spiral galaxy" image
• "elliptical galaxy" image

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