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Space

TermDefinition
Universe All Existing Matter
Galaxy A group of stars held by gravity
Solar System A star (the sun) and objects orbiting it
Star A ball of hot, glowing gas
Planet A large object orbiting a star
Orbit The path an object follows
Gravity Keeps Planets in motion
Comet Ice and dust that forms a tail
Light-Year Distance light travels in one year
Rotation This causes day and night
Revolution Moving around another object
Axis Imaginary line a planet spins on
Mass Amount of matter in an object
Telescope A tool used to see into space
Inner Planets Small, Rocky,, Close to the Sun
Outer Planets Called "Gas Giants"
Earth's Tilt This causes the seasons
365 Days This is how long one revolution of the Earth takes
Created by: Springdale
 

 



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