But in this case, scientists saw a "microlensing" event. When 349Lc moved in front of its stars, its massive gravity warped their light like a giant magnifying glass suspended in space. By analyzing the resulting data (including follow-up observations with the Hubble telescope) researchers determined that the objects being warped by 349Lc were indeed stars, plural, in the right place to be a pair of suns.
“This discovery suggests we need to rethink our observing strategy when it comes to stellar binary lensing events,” Yiannis Tsapras, a co-author of the study from the Astronomisches Rechen Institut in Heidelberg, Germany, said in a statement. “This is an exciting new discovery for microlensing.”