When you look up at the sky on a sunny day, the sun might seem like a bright spot, unchanging in the sky. But the sun is a ...

Welcome back to Ithaca. Thanksgiving break is over, and so are classes; thus, the semesterly final exam period is upon us — and accompanying it, the looming necessity of a lock-in arc. Given the ...

Sunspot AR3842 erupted with an X7.1-class solar flare. NASA models predict that the coronal mass ejection created by the ...

Parker Solar Probe reached "perihelion," the nearest point to the sun in its orbit, on Dec. 13, 2025. Credit: ASA / Johns Hopkins APL / Steve Gribben illustration A NASA spacecraft is making a close ...

Sunspot AR3869 erupted with an X3.3-class solar flare. NASA's Solar Dynamics Observatory captured the fireworks. Footage ...

The sun is an incomprehensibly gigantic, constantly roiling nuclear furnace—but some days are even busier than others. Based on data collected by NASA’s Solar Dynamics Observatory, our solar system’s ...

Space scientists have announced that the Sun has fired four massive solar flares. The outbursts were captured by NASA’s Solar Dynamics Observatory spacecraft, which monitors our star’s activity for ...

Dozens of powerful flares are emerging from a new cluster of activity on the sun, producing stunning photos and sparking concerns about potential risks for global navigation, radio signals and the ...