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Solar system vocab

QuestionAnswer
axis an imaginary line through the center of an object
asteroid large, irregularly shaped, rocky bodies that orbit the Sun
gravity an invisible force that pulls objects toward each other
satellite a natural or man-made object that orbits around a planet or star
comet a small chunk of dust and ice that orbits the Sun
orbit the path of an object around a moon, planet, or star
revolution the movement of one object around another; an orbit
rotation when something spins on its axis
asteroid belt a ring of asteroids orbiting the Sun; located between Mars and Jupiter
celestial bodies natural objects outside of Earth's atmosphere
craters round, hollow areas in the ground made by large space rocks
meteor a meteoroid that burns up as it passes through the Earth's atmosphere ; "shooting star"
meteorite space rocks that land on the surface of Earth
meteoroid small chunks of rock that orbit the Sun
dwarf planet space bodies that orbit the Sun; too large to be asteroids, too small to be planets; may cross over another orbit
solar system the Sun and everything that revolves around it
elliptical a slightly oval shape
planet a giant round ball of rock or gas that orbits around a star
rover a smart robot sent by scientists to explore Mars - unmanned
atmosphere a layer of gas that surrounds and protects the Earth
 



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