comets

核心释义

a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit

1. 1.

   一种小型太阳系天体,主要由挥发性冰、尘埃和岩石颗粒组成,其非常偏心的太阳轨道周期性地使其接近太阳,冰蒸发形成大气或彗发,可能被太阳风吹出形成可见的尾巴

   A small Solar System body consisting mainly of volatile ice, dust and particles of rock whose very eccentric solar orbit periodically brings it close enough to the Sun that the ice vaporises to form an atmosphere, or coma, which may be blown by the solar wind to produce a visible tail.

2. 2.

   (天文学)由冰冻物质组成的小型天体,绕太阳作高度椭圆轨道运动

   (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit

3. 3.

   具有这种天体外观的天文现象

   A celestial phenomenon with the appearance of such a body.

4. 4.

   安第斯山脉发现的几种蜂鸟之一

   Any of several species of hummingbird found in the Andes.

一种小型太阳系天体,主要由挥发性冰、尘埃和岩石颗粒组成,其非常偏心的太阳轨道周期性地使其接近太阳,冰蒸发形成大气或彗发,可能被太阳风吹出形成可见的尾巴；(天文学)由冰冻物质组成的小型天体,绕太阳作高度椭圆轨道运动；具有这种天体外观的天文现象；安第斯山脉发现的几种蜂鸟之一；彗星