NASA's STEREO Spots a New Nova - Universe Today
While on duty observing the Sun from its position in solar orbit, NASA’s STEREO-B spacecraft captured the sudden appearance of a distant bright object. This flare-up turned out to be a nova — designated Sagittarii 2012 — the violent expulsion of material and radiation from a re-igniting white dwarf star. Unlike a supernova, which is … Continue reading "NASA’s STEREO Spots a New Nova"