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15 Cards in this Set
- Front
- Back
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Earth is at the center of the revolving planets and stars.
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Geocentric
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Earth and the other planets revolve around sun.
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Heliocentric
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oval shape, which may be elongated or nearly circular.
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ellipse
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natural satellite that revolves around a planet.
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Moon
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Is 1 Au, equals Earths average distance from the sun.
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Astronomical Unit
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two atomic nuclei combine, forming a larger, more massive nucleus and releasing energy.
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Nuclear Fusion
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the suns central region.
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Core
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region of very tightly packed gas where energy is transferred mainly in the form pf electromagnetic radiation.
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Radiation Zone
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the outer most layer of the suns interior.
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Convection Zone
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the inner layer of the suns atmosphere.
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Photosphere
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middle layer of the suns amosphere
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Chromosphere
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the outer layer, which looks like a white halo around the sun.
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Corona
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the corona gradually thins into streams of electrically charged particles.
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Solar Wind
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areas of gas on the suns surface that are cooler then gases around them.
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Sunspots
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huge, reddish loops of gas that often link different parts of sunspot regions
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Promininces
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