Nasa's comet exploring Hedgehog robot

Nasa is developing a new robot called the "Hedgehog," which could help scientists to explore rocky comets and asteroids.

The robot uses special technology to hop, tumble and spin it's way over rocky surfaces and craters instead of using wheels like the Mars Curiosity rover.

It has eight spikes which cover it's cube-shaped body to help it move around, and protect it.

The researchers are currently looking into how much the robots can do by themselves without instructions from Earth.

The Hedgehog is still being tested by Nasa at the moment, and there are currently no plans to send it into space.