On Thursday, researchers announced the discovery of two new planetary systems, each which contain planets that circle a star similar to our sun, and within a distance that would allow that planet to support liquid water, also known as the "habitable zone."

"With all of these discoveries we're finding, Earth is looking less and less like a special place and more like there's Earth-like things everywhere," said Tom Barclay, Kepler scientist at the Bay Area Environmental Research Institute in Sonoma, California, according to CNN's Elizabeth Landau.