Astronomers have spotted more than 100 new potential alien planets, including one in the fourth-closest star system to the sun, a new study reports.
This haul of newfound possible exoplanets, which have yet to be confirmed as bona fide alien worlds, comes from a new analysis of 20 years' worth of data gathered by the HIRES (High Resolution Echelle Spectrometer) instrument at the Keck Observatory in Hawaii.
In the new study, the researchers identified 60 so-called planet candidates, as well as 54 other suggestive signals that require further investigation before they can be elevated to candidate status.