It is Unknown
i only know two planets the to planets are pegasus 51b and the niburu
The last two planets to be discovered are Uranus (discovered by William Herschel on March 13th 1781) and Neptune (discovered independently by Urbain Le Verrier, John Couch Adams and Johann Galle on September 23rd 1846)
Only three planets have real discovery times. Pluto which is now a dwarf planet was found bye Clyde tombaugh uranus was discovered by sir William herschel neptune was discovered by john couch Adams
Historians reckon that the Babylonians Reconised Venus first around 3500 years ago, then mercury, then Jupiter, mars and Saturn. Not sure of the order of those last three though,
Some of the newly discovered planets beyond Pluto include Eris, Haumea, Makemake, and Gonggong. These are classified as dwarf planets due to their size and orbit characteristics. There have been no new planets discovered in our solar system beyond Pluto that are not classified as dwarf planets.
He never discovered any planets but he discovered that the earth wasnt the center of the universe
There are 8 planets in the solar system: Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune However, there have been over 1000 planets discovered in the last 20 years orbiting other stars.
With a telescope....
1250
New planets are discovered every few days.
Johannes Kepler discovered that the paths followed by planets are ellipses, not perfect circles as previously believed. He formulated three laws of planetary motion, known as Kepler's Laws, which describe the motion of the planets around the sun.
Ptolemey is a scientist that studied the planets and he discovered new planets in place.