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Astronomy 112

Solar System The sun and all orbiting objects
Constellation a grouping of stars as observed from earth
Light Year The distance light travels in a year (in a vacuum)
Comet "dirty snowball" model, made of dust and ice
Meteor if pulled by Earth's gravity they usually burn up due to friction with atmosphere ("shooting star")
Asteroids made of rock and metal, orbit sun but too small be a "planet", most found in the "Asteroid Belt"
Star massive celestial bodies composed of gases, radiate huge amounts of energy (luminous)
Big Bang Theory Theory of the universe formed 15 billion years ago, all matter on earth expanded from a point (a hot, dense mass with an incredibly small volume)
Galaxy a huge rotating collection of stars, gas, planet, billions throughout universe
Solar Eclipse Moon passes directly between the sun and Earth
Lunar Eclipse Moon passes into Earth's shadow
Polaris Ursa Minor, points close to a bright star
Ursa Major First Nations peoples saw it as a bear ("The Great Bear") running from hunters, "Big Dipper"
Ursa Minor Constellation of "The Little Bear"
Nebula a massive cloud of gas and dust
New Moon The lighted part of the moon faces towards the Earth
Black Holes collapsed remnants of giant stars, core collapses into a "black hole", quantity of matter so dense and with gravity so strong that no light can escape
Gravity every object with mass in the Universe attracts every other object, the more massive the object and the closer they are to each other, the greater the force of gravity. Earth's gravity keeps moon in orbit, Earth by sun's gravity
Created by: tart612