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13 Cards in this Set

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