TimesMachine: NINTH PLANET DISCOVERED ON EDGE OF SOLAR SYSTEM; FIRST FOUND IN 84 YEARS; LIES FAR BEYOND NEPTUNE Sighted Jan. 21 After 25 Years' Search Begun by Late Percival Lowell. SEEN AT FLAGSTAFF, ARIZ. Observatory Staff There Spots It by Special Photo-Telescope --Makes Thorough Check. ASTRONOMERS HAIL FINDING The Sphere, Possibly Larger Than Jupiter and 4,000,000,000 Miles Away, Meets Predictions. Reward of Long Search. Announcement of Discovery. NEW PLANET FOUND, FIRST IN 84 YEARS Report to Harvard Observatory. Lowell Called It "Planet X." - NYTimes.com | Zootzle