A Nasa satellite designed to uncover hidden objects in space has blasted off from California.
The Wide-field Infrared Survey Explorer(Wise) was shot into space on a rocket on Monday.
It uses infrared light so it can see things the human eye can't, which scientists say means it can show us the universe as we've never seen it before.
After scanning the sky with a super-sensitive infrared light, it should be able to map out the sky - a bit like the the way maps plots out the roads in a country.
It's hoped it will be bale to beam back images of millions of new asteroids, stars and galaxies.
It will also be able to spot whether there are any asteroids or comets headed towards Earth.