This is from the first night launch of the SpaceX Falcon Heavy (circa June 2019 at NASA’s Kennedy Space Center), which ferried new tech & experiments to space: ranging from greener rocket fuel to a Deep Space Atomic Clock. What appears to be a supernova in this photo is actually the Falcon Heavy’s booster separation. A few minutes into launch, the side boosters separate from the center core booster, and two things happen at once: the second stage fires-up and carries the payload into orbit, while the first stage fires engines and returns to Earth. (If you’re curious, the FH runs on kerosene and liquid oxygen.) This cluster of exhaust particles reflects light as the rocket engines burn through fuel, creating several seconds of an otherworldly phenomenon that’s right out of sci-fi.