“What the heck did we just find?”NASA/JPL-CaltechBy Joshua SokolSOME things that go bump in the night can only be seen with heat vision. SPRITEs, a new class of astronomical explosion, may be showing us never-before-seen phases in the lives and deaths of stars. SPRITEs, short for “eSPecially Red Intermediate-luminosity Transient Events”, are undetectable...