SUMMARY: The Hubble Space Telescope's latest task is to track down elusive Pluto-like objects that lurk at the very edge of our Solar System - many of which seem to travel in pairs like Pluto and its moon Charon. These objects are classified as Kuiper Belt Objects (KBO) and can be found in a vast belt past Neptune. So far, 1% of KBOs have been found to be binary systems, a fact which puzzles astronomers.

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