The Hubble Space Telescope has begun looking for icy worlds beyond Pluto as part of a fast-moving campaign to double the scientific payoff from NASA's New Horizons mission.
New Horizons' primary goal is to send a spacecraft flying past Pluto and its moons in July 2015, more than nine years after it was launched. It's the first mission designed to study a broad belt of icy material on the solar system's rim known as the Kuiper Belt.
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