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Astronomy

Space vocab

QuestionAnswer
Universe Outer space and everything in it.
Star An object made of gas that gives off it’s own light due to nuclear reactions.
Nebula A large cloud of gas and dust in space where stars form.
Galaxy A a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
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 the DISTANCE light travels through space in one year.
Luminosity A measure of how bright a star is.
H – R Diagram Shows the relationship between luminosity, classification, and temperature of stars.
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 branch of science which deals with celestial objects, space, and the physical universe as a whole.
The Sun The star around which the planets and other objects in our 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 that all matter in the universe began with one tremendous explosion
Created by: vdelag2
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