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1·But sunlight is not the only way to heat an astronomical body. Gravity can do it, too.

但太阳光并非让一个天体热起来的唯一途径，引力也可以。

2·The so-called food is a celestial body that was another celestial body or its Heiying Yanzhe all or part of the astronomical scene.

所谓食就是指一个天体被另一个天体或其黑影全部或部分掩遮的天文景象。

天体

1·But sunlight is not the only way to heat an astronomical body. Gravity can do it, too.

但太阳光并非让一个天体热起来的唯一途径，引力也可以。