X marks the spot
Publisher: Economist Newspaper Ltd.
Publication Name: The Economist (UK)
Subject: Business, international
 

Article Abstract:
Uranus was discovered in 1781, then Neptune followed in 1846, and Pluto in 1930, and a tenth planet may have been discovered in 1999. The Open University's John Murray, from Britain, and University of Southwestern Louisiana's John Matese have both concluded that a tenth planet could exist, by separately examining the same data. They have examined data from comet orbits, and they disagree on the exact location of this possible tenth planet. The object could be a brown dwarf star rather than a planet.