That would be Pluto -- and it is not a planet, it is indeed a comet.
The Milky Way is neither a planet nor a comet. It is a spiral galaxy that contains our solar system and billions of stars, along with gas, dust, and dark matter. It is not a single object within our solar system like a planet or a comet.
Herschel observed Uranus on March 13, 1781 and originally thought it to be a comet. It had been previously observed as a "star" by astronomers John Flamsteed and Pierre Lemonnier, and was finally classified as a planet in 1783. Until 1850, it was known by the name Georgium Sidus, after King George III.
Venus is a planet, not a comet, so it does not have a tail.
The planet Uranus was discovered by the British astronomer William Herschel on March 13, 1781. Herschel initially thought he had found a comet, but further observations revealed it to be a new planet.
In 1066, the comet was seen in England and thought to be an omen.
It is a comet.
No. It is a comet. It is too small to be a planet.
No. It is a comet. It is too small to be a planet.
Neither. It is considered a dwarf planet. It is much larger than a comet.
The planet Jupiter was hit by a number of fragments of the Comet Shoemaker-Levy9.
The Milky Way is neither a planet nor a comet. It is a spiral galaxy that contains our solar system and billions of stars, along with gas, dust, and dark matter. It is not a single object within our solar system like a planet or a comet.
Herschel observed Uranus on March 13, 1781 and originally thought it to be a comet. It had been previously observed as a "star" by astronomers John Flamsteed and Pierre Lemonnier, and was finally classified as a planet in 1783. Until 1850, it was known by the name Georgium Sidus, after King George III.
Venus is a planet, not a comet, so it does not have a tail.
No, Mercury is a planet.
Comets.
Basically, Earth is a planet, the Sun is a star, and a comet is an icy small body of ice.
No planet has a "tail". I believe you are thinking of a comet.