Smallest planet yet found outside solar system

This photo provided and annotated by NASA/Hubble Space Telescope shows the five moons in their orbits around Pluto. The smallest moons — no more than 20 miles (32 kilometers) across ‚— were discovered in that past two years and are curren Photo by HOPD
This photo provided and annotated by NASA/Hubble Space Telescope shows the five moons in their orbits around Pluto. The smallest moons — no more than 20 miles (32 kilometers) across ‚— were discovered in that past two years and are curren Photo by HOPD
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