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28 Cards in this Set
- Front
- Back
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absolute magnitude
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the actual brightness of a star
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asteroid
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a large space rock that orbits the sun
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big bang theory
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a theory that describes how the universe was created; a huge explosion in space that hurtled debris everywhere
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black hole
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an object in space with gravity so strong that it pulls everything into it, even light.
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comet
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a mountain sized chunk of ice and dust that orbits the sun
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eclipse
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an object in space casts its shadow on other another object
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galaxy
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a group of millions of stars
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light-year
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the distance that light travels in one year. used to measure distances between objects in space
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lunar phases
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the different shapes or phases of the moon in one month
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lunar eclipse
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the earth casts a shadow on the moon.
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meteor
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a streak of light made by a burning meteroid in the earth's atmosphere
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meteorite
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a meteoroid that strikes the earth's surface
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milky way galaxy
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the galaxy that our solar system is part of
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moon
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a natural object that orbits a planet
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nebula
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a cloud of dust and gas in space
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orbit
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the path that an object in space takes around another object
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planet
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a large object that orbits a star
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radio telescope
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a dish-shaped telescope that collects radio waves from outer space
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reflecting telescope
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a telescope with 2 mirrors and 1 lens
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refracting telescope
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a telescope with 2 lenses
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revolution
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one complete trip of a planet around the sun
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rotation
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the spinning of a planet or a moon on its axis
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satellite
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an object either natural or manmade that orbits a planet
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solar flare
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an eruption on the surface of the sun
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solar system
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the sun all objects that move around it
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star
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an object in space that produces its own heat and light
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solar eclipse
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the moon casts a shadow on the earth
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telescope
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a tool for observing objects at a distance
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