Comets that seldom visit the sun have water and other volatile substances evaporate from their core. Those substances form a long tail out from the core as the solar wind blows them away from the comet. If a comet makes a number of trips around the sun, all of its volatile substances are blown away and it can no longer have a tail.
The comet's tail is in front of the comet, not after
The coma, the nucleus, and the tail are the parts of a comet after the tail has formed.
In the Tail of a Comet was created on 2000-04-25.
Venus is a planet, not a comet, so it does not have a tail.
The three main parts of a comet are the nucleus, coma, and tail. The nucleus is the head of the comet, the coma is the middle, and the tail is the end of the comet.
A comet is a space thing that has a heavenly body and a tail. The most famous comet known is Hailey's comet.
The comet's "tail" is a stream of dust and vapors that melt and get pushed out of the comet by radiation pressure from the sun. The tail appears only when the comet is relatively near the sun, it's longest when the comet is nearest the sun, and it always points away from the sun, no matter which way the comet is moving.
The tail of a comet is over a million miles long.
... nearest the sun.
comet
The tail of a comet is luminous because it scatters and reflects the light from the sun.
A comet