... 行星系（统） planetary system; 行星相 phase of planets; 行星小齿轮 planet pinion; planetary pinion; ...
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phase of the planets 行星象
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Astronomers who have been observing the star since 2005 have determined that as the star expanded into the red giant phase, it destroyed one of its own planets.
FORBES: Astronomers Discover A Star That May Have Destroyed Its Own Planet
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