Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front ...

It was only last October that telescopes spotted a gamma ray burst—caused by the collapse of a black hole —that was so powerful astronomers quickly dubbed it BOAT, for “Brightest of all Time.” That ...

NASA has released the longest-ever time-lapse footage from the Chandra X-ray Observatory showing the expanding remains of Kepler’s Supernova, an explosion that occurred more than 400 years ago. The ...

Or parts of it are. The night sky may seem calm, even serene, but that masks events of a catastrophic and nearly unimaginable scale. Across the galaxy and even the cosmos itself, immense outbursts of ...