We probably can't visit the planets which have been discovered, but it is an amazing discovery, says a spokesman for The Planetary Society.
Seven planets which are close to the size of earth have been discovered around a small star 39 light years away. Three of the planets are situated in what is said to be a habitable zone, meaning they could sustain life.
UK national coordinator Andy Lound told Julia Hartley-Brewer the reason this is an amazing discovery is because it is "quite a stunning thing," but also "the fact we are able to discover this" is in itself brilliant.
He also explained that we "can’t be certain exactly what stage" the planets are at, but added: "There’s no possibility whatsoever in the foreseeable future of the human race that we’re ever going to go there unless something dramatic happens with our technology."
Lound said that in future the "only type of life form we could consider detecting would be something very similar to us," but there might be life "out there which we have yet to even conceive of."
Listen to the full interview above