“We’re finding an exciting potpourri of things we didn’t even think could exist,” said Harvard University astronomer Lisa Kaltenegger, including planets that mirror “Star Wars” Luke Skywalker’s home planet with twin suns and a mini-star system with a dwarf sun and shrunken planets.

“We’re awash in planets where 17 years ago we weren’t even sure there were planets” outside our solar system, said Kaltenegger, who wasn’t involved in the new research.