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10th Planet Discovered - NASA Science →
science.nasa.gov
July 29, 2005: “It’s definitely bigger than Pluto.” So says Dr. Mike Brown of the California Institute of Technology who announced today the discovery of a new planet in the outer solar system. see captionThe planet, which hasn’t been officially named yet, was found by Brown and colleagues using the Samuel Oschin Telescope at Palomar Observatory near San Diego. It is currently about 97 times farther from the sun than Earth, or 97 Astronomical Units (AU). For comparison, Pluto is 40 AU from the sun.
