13 terms

The Solar System and the Universe (ch. 3 Science Fusion)

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Terms in this set (...)

revolve
to go around, or orbit, another object
orbit
the path of one object in space around another object
rotate
to spin on an axis
axis
the imaginary line which Earth rotates around
solar system
a star and all of the planets and other bodies that revolve around it
planet
a large, round body that revolves around a star
comet
a chunk of frozen gases, rock, ice and dust orbiting the sun
dwarf planet
a nearly round body, slightly smaller than a planet, whose orbit crosses the orbit of another body
asteroid
a chunk of rock or iron less than 1,000 km in diameter that orbits the sun
astronomy
the study of objects in space and their properties
star
huge balls of very hot, glowing gases in space that produce their own light and heat
universe
everything that exists, including galaxies and everything in them
galaxy
a group of billions of stars, objects that orbit those stars, gas, and dust

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