A brilliant flash from deep space once baffled scientists. But now, that mystery has been solved—and it reshapes what we know about the universe’s heaviest elements. Back in December 2004, a massive ...

In an ejection that would have caused its rotation to slow, a magnetar is depicted losing material into space in this artist’s concept. The magnetar’s strong, twisted magnetic field lines (shown in ...

Solar Orbiter has captured the clearest evidence yet that a solar flare grows through a cascading “magnetic avalanche.” Small, weak magnetic disturbances rapidly multiplied, triggering stronger and ...

Observations of the slip-running reconnection in active region 13107, as seen by the IRIS (inset) and the Solar Dynamics Observatory / Atmospheric Imaging Assembly instrument. The evolution of ...