The strange new class of cosmic flashes When astronomers first noticed these brilliant blue eruptions, they did not fit any familiar category of stellar explosion. Traditional supernovas brighten over ...

For nearly a decade, some of the most dramatic explosions in the universe have been hiding in plain sight as brief, bright flashes of blue light. New observations now suggest these outbursts are not ...

Blue flashes form in the same way as green flashes. However, the former is harder to spot because air molecules and aerosols scatter blue light, according to Spaceweather.com. When the atmosphere is ...