Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A large triangular asterism formed by the bright stars Altair, Vega, and Deneb, appearing in the summer night sky for observers in the Northern Hemisphere.
Etymologies
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Examples
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The Square of Pegasus is nearing the high meridian at our star map times as the Summer Triangle tumbles westwards and Taurus climbs in the E.
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High in the S, and squashed out of shape by the projection used, is the Summer Triangle formed by the stars Deneb, Altair and Vega (labelled 7, 8 and 9).
Starwatch 2010
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