 A research team used Hubble to study the region of supernova 2013 GE in the NGC-3287 galaxy, 3.3 million light-years away. They saw the light of the supernova fading over time from 2016 to 2020, but another nearby source of ultraviolet light at the same position maintained its brightness. This underlying source of ultraviolet emission is thought to be a surviving binary companion to SN 2013 GE. The discovery is a first for a particular type of supernova, one in which a star is stripped of its entire outer gas envelope before exploding. Normally, hydrogen is found in the outermost layer of a star. When no hydrogen is detected in the aftermath of the supernova, that means it was stripped away before the explosion occurred. The cause of the hydrogen loss had been a mystery until these Hubble observations provided the evidence for the theory that an unseen companion star siphoned off the gas envelope from its partner before it went supernova.