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a unit of length used for distances within the solar system; equal to the mean distance between sun and earth
a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
layer just outside the sun's core, where energy is transported mostly in the form of radiation
a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun
a fourth state of matter distinct from solid or liquid or gas and present in stars and fusion reactors
areas on the sun's surface that are cooler and less bright than surrounding areas, are caused by the sun's magnetic field, and occur in cycles
an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force
large eruptions of luminous hydrogen gas that rise thousands of kilometers above the chromosphere
a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Bing Bang Theory
a cosmological theory holding that the universe originated approximately 20 billion years ago from the violent explosion of a very small agglomeration of matter of extremely high density and temperature.
Doppler Red Shift
apparent shift in spectrum to the red end due to the movement of the light emitting object in space away from the observer
Early form of a star; This stage lies between the collapsing of dust and gas and the beginning of nuclear fusion
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