(CNN) - It's a massive discovery that's out of this world.
NASA scientists say they've found what could be a huge planet outside of our solar system. They're calling it a "super-Jupiter."
They say it orbits a star 170 light years away, and is about 13 times the size of Jupiter.
NASA says there's also the possibility the "super-Jupiter" could actually be a brown dwarf star.
Brown dwarf stars are able to generate energy by fusion, while massive planets are only able to slowly radiate the heat leftover from their own formation.