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| a transient fiery streak in the sky produced by a meteoroid passing through the earth's atmosphere also called a shooting star or bolide |
| the Goat, a zodiacal constellation between Sagittarius and Aquarius. |
| Hubble's law | |
| —n | |
| astronomy a law stating that the velocity of recession of a galaxy is proportional to its distance from the observer | |
| Hubble's law (hŭb'əlz) Pronunciation Key
A law of cosmology stating that the rate at which astronomical objects in the universe move apart from each other is proportional to their distance from each other. Current estimates of the value of this proportion, known as Hubble's constant, put its value at approximately 71 kilometers per second per megaparsec. |