单词 | whipple's comet |
释义 | Whipple's cometWhipple's cometA comet that started life with a near-circular orbit, eccentricity 0.167, period 10.3 years, and has been perturbed by Jupiter so that Żit now has an eccentricity of 0.26 and a period of 8.5 years. The comet seems to decrease in brightness by one magnitude at each return. |
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