NASA

We now know that Pluto, the dwarf planet formerly known as a planet, has one more moon orbiting it. Using the Hubble Space telescope, astronomers have discovered Pluto's fifth moon.

NPR's Joe Palca filed this report for our Newscast unit:

"The new moon is tiny, something between 6 and 15 miles across. It showed up in nine separate images the space telescope made in the last month. The latest image came earlier this week.

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