Smallest planet yet found outside solar system

You've reached 4 FREE premium stories this month

Simply register to continue. It's free.

Register Learn more

Already registered? Click here to login.

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
Advertisement