[PAR] [TLE] Carl Otto Lampland [SEP] Carl Otto Lampland (December 29, 1873 – December 14, 1951) was an American astronomer.  He was involved with both of the Lowell Observatory solar system projects, observations of the planet Mars and the search for Planet X. [PAR] [TLE] Planets beyond Neptune [SEP] Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit.  The search began in the mid-19th century and culminated at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities.
[PAR] [TLE] Carl Otto Lampland [ SEP ] Carl Otto Lampland ( December 29 , 1873 – December 14 , 1951 ) was an American astronomer . He was involved with both of the Lowell Observatory solar system projects , observations of the planet Mars and the search for Planet X. [PAR] [TLE] Planets beyond Neptune [ SEP ] Following the discovery of the planet Neptune in 1846 , there was considerable speculation that another planet might exist beyond its orbit . The search began in the mid-19th century and culminated at the start of the 20th with Percival Lowell 's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets , particularly Uranus and Neptune , speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities .
Who was the American astronomer involved in the search for a planet thought to explain apparent discrepancies in the orbits of the giant planets?
Who was the American astronomer involved in the search for a planet thought to explain apparent discrepancies in the orbits of the giant planets ?
Carl Otto Lampland
Carl Otto Lampland