sidereal hour angle

sidereal hour angle

noun Astronomy.
the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body.
Compare hour angle.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Sidereal hour angle is always a great word to know.
So is meteoroid. Does it mean:
any of the small bodies, often remnants of comets, traveling through space: when such a body enters the earth's atmosphere it is heated to luminosity and becomes a meteor
a low-mass star that emits low to average amounts of light that burn their hydrogen slowly over a long life span
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