Spitzer Studies Planet X
An artist's conception of 2003UB313, NASA/JPL-Caltech/R. Hurt (SSC)
On August 23 and 25, NASA's Spitzer Spitzer Space Telescope looked toward the recently discovered planet beyond Pluto, identified as 2003UB313. The observations were scheduled after an earlier attempt failed due to an error by the Spitzer project team in processing the request. Spitzer measures the amount of heat given off by planets and other objects, enabling researchers to infer the overall size of the bodies. The results of the recent observations are currently being analyzed.