Upon impact, it unleashed a severe G4-class geomagnetic storm, as confirmed by Noaa's Space Weather Prediction Center.

The blast may have been a kilonova — a type of neutron star merger — in the wake of a more traditional supernova.

"Our study provides a new direction to understand the whole evolutionary history of massive stars toward the formation of ...

In this special issue of the Bulletin of the Atomic Scientists, published by SAGE, experts reflect on 2011 and highlight what to look out for in 2012 in the areas of nuclear energy, nuclear weapons, ...

New evidence suggests that a comet explosion over North America may have triggered a massive wave of destruction nearly 13,000 years ago, killing off mammoths and mastodons and wiping out one of the ...

Scientists have precisely measured two unstable atomic nuclei that play a crucial role in explosive X-ray bursts on neutron stars. The results reveal faster nuclear reactions than previously thought, ...

A nuclear winter is a theoretical concept, but if the climate scenario expected to follow a large-scale nuclear war, in which smoke and soot from firestorms block sunlight, came to fruition, global ...

Astronomers have released a rare time-lapse video showing the violent expansion of a dead star over two decades. The footage ...