Smallest Planet Yet Found

About the size of our moon

Astronomers searching for planets outside our solar system have discovered the tiniest one yet - one that's about the size of our moon.

But hunters for life in the universe will need to poke elsewhere. The new world orbits too close to its sun-like star and is too sizzling to support life. Its surface temperature is an estimated 700 degrees Fahrenheit. It also lacks an atmosphere and water on its rocky surface.