Pluto
Pluto recently lost its status as a planet and is now a dwarf planet.
Pluto. Until recently (a few years ago), it was considered a planet.
Pluto was recently stripped of the honour of being a planet
water was recently discovered on planet mars
Pluto
Pluto. From its discovery in 1930 until 2006, it was considered the ninth planet. It was reclassified as a Dwarf planet in August 2006.
Pluto was considered a planet until fairly recently. It has now been established as belonging to the kuiper belt, rather than our solar system - and thus has been 'downgraded' to a dwarf planet.
No. Neptune is actually the 8th planet. They are, in order from the sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Until recently, Pluto was considered the ninth planet, but had that revoked following much debate.
A planet used to be defined as an object that orbits the Sun. Asteroids orbit the Sun, so are planets. Recently The definition of Planet has been revised so that they are not considered planets any more. (The redefinition has lead to Pluto no-longer being a planet too.)
Pluto has recently been categorized as a dwarf planet.
The outer planets are Jupiter, Saturn, Uranus, and Neptune. Pluto used to be considered an outer planet until it was no longer considered to be a planet.The inner planets are Mercury, Venus, Earth and Mars.
It's not a planet. Because its not big enough to be considered a planet.