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33 Cards in this Set
- Front
- Back
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Word
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Definition
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Star
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balll 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 eachother.
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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 that is 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 the 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 atmosphere above the photosphere.
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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 above 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 gas collapsed and whose gravity is so powerful that it pulls in everthing even light.
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Quasar
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continuous burst of brilliant light and enormous energy from a very massive black hole.
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