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Chapter 9


axis the imaginar line around which Earth spins as it rotates.
comet A ball of rock, ice, and frozen gases in space.
constellation A pattern of stars that form an imaginary picture or design in the sky.
galaxy A huge system of many stars, gas, and dust.
moon A natural body that revolves around a planet.
phases The different shapes the Earth's moon seems to have.
orbit The path of one objuect in space around another object.
planet A large object that moves around a star.
solar system A group of objects in space that revolve around a central star.
star A huge ball of superheated gases.
sun The star at the center of our solar system.
universe everything that exists in space.
Created by: AMES