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UnitC Chapter4 vocab

oval shaped like a flattened circle elliptical
a representation of how something looks or works model
a rocky object that revolves around the sun asteroid
a small piece of rock or metal that travels in space around the sun meteoroid
a bright streak of light that passes through earth's atmosphere meteor
a ball of ice,dust,and gases that travels through space and orbits the sun comet
a piece of a meteoroid that lands on earth after passing through the atmosphere meteorite
astronomical units AU
the distance light travels in one year light year
stars that appear to be in groups when viewed from earth constellation
a group of billions of stars,dust,and gases in space held together by gravity galaxy
an instrument that separates light into patterns of lines of different colors spectroscope
the bending of light as it passes from one material to another; a way to gather and focus light refraction
the bouncing of light off, a surface; a way to gather and focus light reflection