New images reveal what really happens when stars explode

Two stellar explosions captured on camera just days after they began have shattered astronomers' understanding of how stars blow up. Using an advanced telescope array in California, researchers watched these cosmic detonations unfold in real time, revealing that what scientists long thought were simple, single blasts are actually complex, multi-stage events.

The explosions, called novae, happen when dense stellar remnants steal gas from companion stars until the material ignites in runaway nuclear reactions. One nova raced through its entire cycle in mere days while ejecting gas in two perpendicular streams that collided violently. The other held onto its outer layers for more than 50 days before finally releasing them in a delayed explosion.

"It's like going from a grainy black-and-white photo to high-definition video," said lead researcher Elias Aydi from Texas Tech University. The observations, published in Nature Astronomy, directly connected these colliding gas streams to the gamma rays detected by NASA's Fermi telescope, solving a puzzle about why stellar explosions generate such high-energy radiation and transforming novae into laboratories for studying extreme physics.