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Our Planet Earth

Geography Chapter 1

Star A large, luminous ball of gas that is held together by it's own gravity
Universe All that exists
Galaxy One of the vast numbers of systems containing stars, nebulae, star clusters and space debris that make up the universe
Milky Way Our galaxy
Light year The distance light travels in a vacuum in one year, approximately 5.88 trillion miles
Satellite A man-made object or vehicle made to orbit the earth ; a celestial body orbiting another of larger size
Solar system The sun and everything that orbits around the sun
Orbit The path taken by a body in space as it moves around it's center of attraction
Revolution A complete turn around an axis or point
Centrfugal force The force that pushes objects in a curved motion away from the center of the curve
Created by: burtlo