That's Pluto. Note that it is not currently considered a planet, but after it was discovered, it was generally considered to be one.
Pluto was a planet discovered in 1930
Pluto was discovered in 1930 but it is not a planet anymore according to the International Astronomer's Union
An American astronomer named Clyde Tombaugh discovered Pluto in 1930
Pluto was discovered by the American Clyde W. Tombaugh, but it is no longer a planet.
Pluto was discovered in 1930 by American astronomer Clyde Tombaugh. It was considered the ninth planet in the solar system until 2006, when the International Astronomical Union reclassified it as a dwarf planet.
Pluto was discovered in the 1930s by American astronomer Clyde Tombaugh. Initially classified as the ninth planet in our solar system, Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union.
Pluto was discovered in 1930. At the time it was considered to be a planet, but it is now considered a dwarf planet.
Pluto was discovered in 1930 by Clyde Tombaugh.
Pluto was discovered in 1930 and dubbed the ninth planet. It was known as the ninth planet up until 2006, when it was reclassified as a dwarf planet. Now there are only eight officially recognised planets in our solar system, with an additional five dwarf planets and several more dwarf planet candidates.
In 1930, the dwarf planet Pluto was discovered by astronomer Clyde Tombaugh. Initially classified as the ninth planet in our solar system, Pluto's discovery expanded our understanding of the outer reaches of the solar system. However, it was reclassified as a dwarf planet in 2006 by the International Astronomical Union due to new criteria for planet classification.
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, Discovered in 1930