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Our Planet Earth
Geography Chapter 1
Question | Answer |
---|---|
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 |