| 单词 | nova |
| 释义 | nova A star that, over a period of only a few days, becomes 103–104 times brighter than it was. Some 10–15 such events occur in the Milky Way each year. Novae are believed to be close binary stars, one component of which is usually a white dwarf and the other a red giant. Matter is transferred from the red giant to the white dwarf, on whose surface it accumulates, eventually leading to a thermonuclear explosion. See also supernova |
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