At least three of them are very like Jupiter in size and orbit.
Despite some of them being up to 10 times the size of Jupiter, these planets are still too far away to be seen.
But scientists all over the world are looking at nearby stars and seeing them "wobble"!
The "wobbles" were spotted by telescopes in Hawaii, New South Wales in Australia and California in the US.
As we find more and more planets, it shows the chances of us being alone in the universe become smaller and smaller.