The Day the Sky Flashed Twice: What Caused the Mysterious Vela Incident? On September 22nd 1979, the sensors aboard the US Vela Satellite picked up a distinctive signal from somewhere in the vast expanse of the South Atlantic ocean. It was a mysterious “double flash” of blinding light. Even today no-one knows for sure what caused the Vela incident... | Dark Documentaries

A 1.3 gigapixel image has been constructed using Vela Supernova Remnant imagery captured by the Dark Energy Camera. Learn more 👉 https://trib.al/CGirH1W Images and Videos: CTIO/NOIRLab/NSF/AURA, T. Matsopoulos, N. Bartmann Image Processing: T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), M. Zamani (NSF’s NOIRLab) & D. de Martin (NSF’s NOIRLab) Music: Stellardrone - Airglow | Space.com