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Unit 8

Small Bodies in the Solar System Notes

TermDefinition
dwarf planet a celestial body that orbits the sun and is round because of its own gravity.
Kuiper Belt a region of the solar system that begins just beyond the orbit of Neptune and contains small bodies made mostly of ice.
Kuiper Belt object (KBO) any of the minor bodies in the Kuiper Belt outside the orbit of Neptune.
comet a small body of ice, rock, and dust that follows a highly elliptical orbit around the sun.
Oort cloud a spherical region that surrounds the solar system and extends almost halfway to the nearest star.
asteroid a small, irregularly shaped, rocky object that orbits the sun.
meteoroid sand grain- to boulder- sized rocky body that travels through space.
meteor bright streak of light that results when a meteoroid burns up in earth’s atmosphere.
meteorite a meteoroid that reaches Earth’s surface without burning up.
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