1590s, "a constellation, a group of stars," from Greek asterismos "a marking with stars," from aster "star" (see astro-). Any grouping of stars, whether a constellation or not (though in modern use, usually the latter). The "Big Dipper" is an asterism, not a constellation.
实用例句
1. It isn't far from the graceful Circlet asterism in the constellation Pisces.
它的不远处,就是带有优雅头箍的双鱼座星群.
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2. First, locate the prominent Teapot asterism in the constellation Sagittarius the Archer.
首先, 先找出人马座中著名的‘大茶壶’星群.
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3. The space asterism spot, is the angel eye.
天上繁星点点, 是天使的眼睛.
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4. Modern stargazers sometimes mistake it for the asterism known as the Little Dipper.
现代天文学家有时会把它误认为小熊星座.
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5. An asterism is a star formation that is not an officially recognized constellation.