Pluto was discovered in 1930 by a lucky accident. It was predicted mathematically that there was a planet beyond Neptune. Not knowing this, Clyde W. Tombaugh at Lowell Observatory in Arizona did a very careful sky survey which turned up Pluto anyway.
People have thought of Pluto as our ninth planet for nearly 200 years since it was discovered in 1830.
Some still do so today but times are changing
The IAU International Astronomical Union in 2005 classified Pluto as a Dwarf Planet so in answer to you question Pluto has been thought of as our tiny distant planet cousin since then.
Only now are people accepting of the reality that it does not make the guidelines set to be a Planet but it does fall into the guidelines that make it clearly defined as a Dwarf Planet.
How ever personal people take this, Pluto remains one of the most fascinating body's in the Solar System and we need to learn more of it's complex existence.
August 2006 by the IAU (International Astronomical Union)
Pluto has been a dwarf planet for 5 years in 2011. It will be 6 in 2012. 7 in 2013. {ect.} Pluto became a dwarf planet in 2006 August 24th.
Pluto used to be one of the nine planets, but it was re-classified as a Dwarf Planet on August 24th 2006 by the International Astronomical Union (IAU).
Pluto was considered a major planet for 76 years.
Pluto was discovered in 1930.
76 years
Nothing. You may be referring to the planet Pluto, which was DISCOVERED in 1930, but it had in all probability been part of the solar system since the Sun ignited 4.5 billion years ago.
Pluto has been made an exception and excluded from the solar planets..
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Pluto is the furthest planet in the solar system from the sun. No astronauts have ever been actually on Pluto. THERE ARE NO TOURIST ATTRACTIONS ON PLUTO!
a dwarft planet
Nothing. You may be referring to the planet Pluto, which was DISCOVERED in 1930, but it had in all probability been part of the solar system since the Sun ignited 4.5 billion years ago.
No new planets have been discovered in our Solar System since 1930 when Pluto was discovered - now demoted to a dwarf planet. See related question for details and links of all the new exoplanets found.
There are no newly discovered planets. Pluto used to be considered a planet, but is no longer. Sedna, Quoar, Eris, and Varuna are just a few of the newly discovered trans neptunian objects (bodies beyond Neptune). Eris is larger than Pluto. Far, far beyond our solar system more than 335 exoplanets (planets orbiting other stars) have been discovered. These are not at all particularly close to our solar system.
Pluto has been made an exception and excluded from the solar planets..
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mercury it was pluto but pluto has been considered as a "dwarf planet"
Pluto is the furthest planet in the solar system from the sun. No astronauts have ever been actually on Pluto. THERE ARE NO TOURIST ATTRACTIONS ON PLUTO!
a dwarft planet
Yes, it hasn't been left behind! Pluto orbits the sun, so as the sun moves, Pluto goes with it.
Pluto is the only one that has been taken away from the solar system for now but more planets are beginning to be argued over. Pluto was taken out because it was a moon.
Pluto has been declined as a planet because of its size it is the smallest planet in the solar system that scientists have found.
Yes and no. It was decided on August 24, 2006 that Pluto be classified a dwarf planet. Because dwarf planets are a subclassification of planet, it would be accurate to call Pluto a planet, in a general setting (bearing in mind, though, that there are 10+ other dwarf planets in our solar system, some larger than Pluto).