Is it true that the tenth planet has been discovered? who discovered it and what are its special features?

Answer 1

No.

Its likely even that Pluto will be relegated to being a Kuiper belt object rather than a plnet, leaving just 8.

Kuiper belt objects are regularly discovered.

Answer 2

A planet larger than Pluto has been discovered in the outlying regions of the solar system with the Samuel Oschin Telescope at Palomar Observatory, California Institute of Technology.

The planet is a typical member of the Kuiper belt, but its sheer size in relation to the nine planets already known means that it can only be classified as a planet, Brown says. Currently about 97 astronomical units from the sun (an astronomical unit is the distance between the sun and Earth), the planet becomes the farthest-known object in the solar system, and the third brightest of the Kuiper belt objects.

"It will be visible over the next six months and is currently almost directly overhead in the early-morning eastern sky, in the constellation Cetus," says Brown, who made the discovery with colleagues Chad Trujillo, of the Gemini Observatory, and David Rabinowitz, of Yale University, on January 8.

Brown and Trujillo first photographed the new planet with the 48-inch Samuel Oschin Telescope on October 31, 2003. However, the object was so far away that its motion was not detected until they reanalyzed the data in January of this year. In the last seven months, the scientists have been studying the planet to better estimate its size and its motions.

"It's definitely bigger than Pluto," says Brown, who is professor of planetary astronomy. Scientists can infer the size of a solar-system object by its brightness, just as one can infer the size of a faraway light bulb if one knows its wattage. The reflectance of the planet is not yet known--in other words, it's not yet possible to tell how much light from the sun is reflected away--but the amount of light the planet reflects puts a lower limit on its size

Answer 3

Planet X was a large hypothetical planet orbiting beyond the orbit of Neptune. The X stands for "unknown", not the Roman number 10; there were only 8 known planets at the time. Its existence, first as a ninth planet, and after 1930 as a tenth, was postulated on the basis of apparent discrepancies in the orbits of the gas giants, especially those of Uranus and Neptune. Those discrepancies have largely been resolved by modern measurement, removing the basis for Planet X.
After discovering Pluto, Tombaugh continued to search the ecliptic for other distant planets. He found asteroids, variable stars, and even a comet, but no more planets.
After Pluto and Charon (discovered in 1978), no more trans-Neptunian objects were found until the discovery of (15760) 1992 QB1 in 1992. Since that time,

hundreds of trans-Neptunian objects have been discovered. The objects are now recognized as mostly belonging to the Kuiper Belt: icy bodies orbiting in the plane of the ecliptic beyond Neptune which are left over from the formation of the solar system. Pluto itself is now recognized as being one of the largest of the Kuiper Belt objects. This has caused some concern over whether Pluto should be called a planet, but at this time Pluto officially remains a planet [1].

Answer 4

A planet larger than Pluto has been discovered in the outlying regions of the solar system with the Samuel Oschin Telescope at Palomar Observatory, California Institute of Technology.

Ever since the discovery of Pluto, the existence of a tenth planet has been speculated by astronomers and the general public alike. Tenth planets have frequently appeared in fiction, and media reports of new trans-Neptunian object (TNO) discoveries have also used the label with some frequency.

Answer 5

Only one person had discovered the 10th Planet.He is a scientists of yale university.It was discovered first on october 24, 2004. Its name is given SEDENA.On the Roman godess of sea.It is very-2 smaller then Pluto.So the scientists are yet deciding to accept it as a planet or not.

Answer 6

Well, some people say it has been discovered, but it is small enough to make people debate if Sedna is even worthy to be called a planet. And some even raise the question if Pluto should be a planet.

Answer 7

Actually the 10th planet was discovered years ago. Problem is it has been destroyed.
Using the PHI formulae to calulate the planets positions and their proportions to each other and the sun the PHI formulae calculations suggest that the 10th planet was at the location where the astroid belt presently is.
I read this some where years ago.

Answer 8

the 10th planet has been discovered and not one person discovered it, the scientists using the telescope at yale university discovered it first on october 24, 2004

Answer 9

No they have not yet discovered another planet, there has been no evidence what so ever, and even if there was would it really matter, there are tons of galaxies, what does one planet make different?

Answer 10

Actually, more than ten "planets" have been discovered, but along with Pluto, it is a subject of debate whether they should actually be defined as planets or not.