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.
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.
"Halley's Comet appears every 76 years."