Growing up with Pluto #3 – Two frozen worlds

In 1990 the Hubble Space Telescope revealed Pluto and Charon as separate worlds. NASA, ESA, and STScI.

In 1990 the Hubble Space Telescope returned photos of Pluto separated from Charon. Up to that time the best ground based images, from the Canada-France_Hawaii telescope in the image above, still showed Charon as a bump on Pluto.

In 1994 the view improved when the optics on HST were corrected. NASA, ESA, and STScI.

Then in 1994 the the view improved again after the HST optics were corrected. Charon now appeared ‘bluer’ than Pluto (although this doesn’t show up in the images) indicating the two worlds had different surfaces.


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