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Unit 5 The Universe

Across
All of the types of electromagnetic radiation grouped and organized by levels of energy
A classification system for stars based on their color and temperature.
the intensity of light from a celestial object, used to identify the object's characteristics
a graph that plots luminosity v. temperature of stars
the average distance between Earth and the Sun
Large cloud of gas and dust in interstellar space; the location of star formation.
Down
A galaxy that has an undefined shape; have large numbers of young stars, greats amounts of gas and dust and are usually found near larger galaxies
The type of energy released by stars consisting of electric and magnetic waves that travel at the speed of light.
A collection of stars, dust, and gas bound together by gravity
A galaxy shaped like a round or flattened ball, generally containing only old stars
a galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
Distance light travels in one year.