Astronomers and satellite operators are on high alert. "More flares are in the offing," warn forecasters, as the sunspot's instability promises weekend fireworks.

Astronomers from the University of Hawaiʻi's Institute for Astronomy (IfA) have discovered the most energetic cosmic explosions yet discovered, naming the new class of events "extreme nuclear ...

Astronomers have uncovered a new extreme in the universe's catalog of violent phenomena — a class of cosmic explosions so powerful that they rank among the most energetic events since the Big Bang.