Hubble’s Pluto Discoveries

From HubbleCast. Before NASA’s New Horizons probe flew past Pluto in July 2015, almost all of the information scientists had about this mysterious dwarf planet came from observations made by Hubble. What discoveries did Hubble make in the Pluto system and how will the greatest telescope ever built advance our knowledge of this distant, icy world following New Horizons’ flyby?

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