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8th Astronomy

Astronomy

TermDefinition
Universe Outer space and everything in it.
Star An object made of gas that gives off energy.
Nebula A large cloud of gas and dust in space where stars form.
Galaxy A large grouping of stars in space.
Spiral Galaxy A galaxy with a bulge in the center and distinctive spiral arms.
Irregular Galaxy A galaxy with an irregular shape.
Elliptical Galaxy A spherical or elongated-shaped galaxy.
Milky Way Galaxy The name of the galaxy where we live.
Magnitude A measure of how bright a star is.
H – R Diagram Shows the relationship between absolute magnitude, luminosity, classification, and effective temperature of stars.
Electromagnetic Spectrum The range of all the waves that can travel through matter as well as empty space.
The sun The star around which the planets and other objects in the solar system revolve.
Black hole The remains from the death of a star. It is so massive that not even light can escape its gravitational pull.
Luminosity The brightness of a celestial object.
Big Bang The theory that is the leading explanation about how the universe began.
Created by: tneal1