All Things Space, UFOs, etc.University of Hawaiʻi astronomers discover biggest explosion since the Big Bang Posted on June 19, 2025 by Administrator A team at the University of Hawaiʻi’s Institute for Astronomy has uncovered a dazzling new kind of cosmic explosion, more energetic than anything seen before, according to a news release from the university. The team named these rare events “extreme nuclear transients,” which occur when massive stars, which are at least three times the mass of the Sun, are shredded by supermassive black holes.