planetary precession

noun Astronomy.

the small component of the precession of the equinoxes contributed by the motion of the ecliptic, the change in orientation of the plane of the earth's orbit being produced by the gravitational attraction of the planets.

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Origin:
1860–65

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Planetary precession is always a great word to know.

So is Taurus. Does it mean:

a transient fiery streak in the sky produced by a meteoroid passing through the earth's atmosphere also called a shooting star or bolide

a zodiacal constellation between Gemini and Aries, containing the bright star Aldebaran also called the Bull

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