Pluto, now officially considered a "dwarf planet", was discovered by Clyde Tombaugh at Lowell Observatory in Flagstaff, AZ, in 1930.
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 by the American Clyde W. Tombaugh, but it is no longer a planet.
The first planet discovered besides Earth is Uranus. It was discovered by William Herschel in 1781.
Uranus was the first planet to be discovered in 1781.
In "modern times" as we know them, Uranus was the first planet discovered. All the other planets known to then were visible to the naked eye from earth, and, thus, were known to ancients. It is exceptionally dim and moves very slowly in its orbit. Uranus was discovered by William Hershel, who saw it in a telescope and announced his discovery on March 13, 1781. The Neptune was discovered in 1846.
1930s - 1940s
Which planet?
No planet was discovered in 1932. You probably mean Pluto. That was discovered in 1930. It has since been downgraded to a "dwarf planet".
Operant conditioning was discovered by psychologist B.F. Skinner in the 1930s.
William herschel discovered the planet uranus
The planet Uranus was discovered in 1781 by William Herschel.
THIS PLANET IS THE FIRST TO BE DISCOVERED BY MATH THIS PLANET IS THE FIRST TO BE DISCOVERED BY MATH
water was recently discovered on planet mars
Pluto was discovered in 1930. At the time it was considered to be a planet, but it is now considered a dwarf planet.
Uranus is the seventh planet from the sun and was discovered in 1781.
It was discovered in 1978. But it's not a dwarf planet. It's a moon of the dwarf planet Pluto.
The planet Neptune was the second last planet to be discovered in our solar system. It was officially discovered in 1846 by Johann Gottfried Galle, based on mathematical predictions by Urbain Le Verrier.