2007-05-09 11:13:01 · 5 answers · asked by john cena 1 in Science & Mathematics ➔ Astronomy & Space
You are referring to Pluto. It is not an "ex planet" because it is still a planet. It is referred to now as a dwarf planet instead of a major planet.
THIS IS THE ANSWER I POSTED ON ANOTHER QUESTION...IT MIGHT BE INFORMATIVE.
Okay...don't listen to anything that the other people have told you. They have no idea what they are talking about. Pluto is no longer a major planet in the solar system it is called a dwarf planet. There are currently 3 dwarf planets in the solar system which are Ceres, Pluto and Eris. These dwarf planets have been determined from their properties and grouped into another category separate from the major planets. Pluto no longer being a major planet in the solar system has nothing to do with it being small. It has nothing to do with the other celestial bodies around the planet that could be labeled as planets. If they "could be" labeled as planets, they WOULD be labeled as planets. In order to be a major planet in the solar system there are properties that the planet must possess. There are 4 main properties of a dwarf planet which include the body has to be in orbit around the sun, may not be a satellite of another object (which means no moons), have not cleared its orbital path and must have a nearly spherical shape. Pluto is no longer a major planet because it has NOT cleared its orbital path. Obviously because it is has NOT cleared its orbital path, in order to be a major planet the body must have cleared its orbital path.
2007-05-09 11:21:04 · answer #1 · answered by hotblondbabe420 4 · 0⤊ 0⤋
There are several hundred exoplanets. An exoplanet is an extra solar planet, or planet orbitting some other star.
Quoaor, Varuna, Sedna, all would have been planets if Pluto was still a planet. Ceres, for that matter, was once considered to be a planet. Now it is just the king of the asteroids. Sedna is bigger than Pluto.
2007-05-09 12:14:28 · answer #2 · answered by Anonymous · 0⤊ 0⤋
There is a relatively newfound planet in our solar system, called 2003UB313. With a poweerful telescope, the planet is seen moving across a field of stars.
Scientists did not discover that the object in these pictures was a planet until Jan. 8, 2005.
2007-05-09 11:22:39 · answer #3 · answered by Curiosity 7 · 0⤊ 0⤋
Are you referring to Pluto? It is now no longer officially considered a "planet."
2007-05-09 11:18:45 · answer #4 · answered by usernametakenlawl 2 · 0⤊ 0⤋
If you mean planet X, it hasn't been found. If you mean ex-planet, that would be Pluto.
2007-05-09 11:21:04 · answer #5 · answered by Gene 7 · 0⤊ 0⤋