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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.
Moon A natural satellite of a planet.
Comet A body of ice, rock, and dust that orbits the sun.
Light Year A measure of how long it takes light to travel through space in one year.
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.
Gas Giant A large planet made mostly of gases and found in the outer solar system.
Terrestrial Planet A rocky planet in the inner solar system.
Meteorite A piece of rock from space that has landed on the Earth's surface without completely burning up.
Meteoroid A small, rocky body that revolves around the Sun; smaller than an asteroid.
Asteroid A small, rocky body that revolves around the Sun.
Meteor A bright streak of light caused by the burning of a piece of rock from space as it enters the Earth's atmosphere.
Electromagnetic Spectrum The range of all the waves that can travel through matter as well as empty space.
Astronomy The study of all physical objects beyond Earth.
The sun The star around which the planets and other objects in the solar system revolve.
Constellation A recognizable star pattern.
Black hole The remains from the death of a star. It is so massive that not even light can escape its gravitational pull.
Big Bang Theory A theory that states the universe began with a tremendous explosion
Magnitude A measure of how bright a star is.
Created by: tneal1