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33 Cards in this Set
- Front
- Back
Word
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Definition
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Star
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ball of gases that gives off light and heat
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nebula
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A cloud of gas and dust in space.
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Protostar
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dense material in the center of a nebula that is about to become a star
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Binary stars
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two stars that revolve around each other
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star cluster
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Large group of stars that travel together through space.
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Spectrum
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pattern of different colors of light coming from an object
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Spectrograph
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device that measures the spectrum of an object
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Spectroscopy
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study of light coming from objects in space
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magnitude
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A way to measure a star's brightness.
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main sequence star
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A star that falls within a long, narrow, band across the H-R diagram.
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Red Giant
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large, bright star this fairly cool
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Supergiant
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very large and very bright star
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white dwarf
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Very small, hot star
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Nova
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explosion where the outer layers of a star are blown off
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Supernova
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violent explosion where a star is blown apart
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core
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Center of the Sun
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Photosphere
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inner layer of the sun's atmoshpere above the photoshpere
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Chromosphere
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layer of the sun's atmosphere above the photosphere
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Corona
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outer layer of the sun's atmosphere
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sunspot
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Dark, cool area on the Sun's surface.
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Prominence
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stream of gas that shoots high abovew the sun's surface
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Solar Flare
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eruption of electrically charged particles from the surface of the sun
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Nucleus
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center, or core, of an atom
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fusion
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Reaction in which atomic nuclei combine to form larger nuclei.
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Constellation
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group of stars that form a pattern in the sky
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Galaxy
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huge collection of stars, gas, and dust that travel together through space
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elliptical galaxy
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Galaxy shaped like a ball or slightly flattened ball.
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Irregular galaxy
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galaxy with no definite shape
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Spril galaxy
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galaxy shaped like a flattened disk with spiral arms
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big bang
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Explosion that may have begun the universe about 14 billion years ago.
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Black hole
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massive star that has collapsed and whose gravity is so powerful that it pulls in everything, even light
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Quasar
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continuous burst of brilliant light and enormous energy from a very assive black hole
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