comet
Definition
A celestial object consisting of a nucleus of ice and dust that, when near the sun, develops a tail of gas and dust pointing away from the sun.
中文 由冰和尘埃核组成的天体，靠近太阳时会产生指向远离太阳的气体和尘埃尾。
Example
"Halley's Comet appears every 76 years."
A celestial object consisting of a nucleus of ice and dust that, when near the sun, develops a tail of gas and dust pointing away from the sun.
中文 由冰和尘埃核组成的天体，靠近太阳时会产生指向远离太阳的气体和尘埃尾。
"Halley's Comet appears every 76 years."