Space Weather

A strange radio signal that seemed to emanate from a small nearby star probably came from Earth-orbiting satellites, astronomers said.

After a coronal mass ejection from the sun hit Earth's magnetic field on Sunday (July 16), space weather forecasters predict that geomagnetic storms may cause some intense auroras this evening.

Strange radio signals have been spotted coming from the vicinity of a nearby star — but don't get your hopes up that aliens are responsible.

Is our sun fundamentally different from other "sun-like" stars? This question highlights an ongoing controversy about whether our nearest star is unique or, in fact, an "ordinary star."

NASA's Solar Dynamics Observatory has captured a stunning view of a sunspot cascading from tail to core across the sun's surface.

The southern lights appear to dance on the horizon off the southern coast of Australia in a stunning new photo taken by an astronaut aboard the International Space Station.

Coronal holes on the Sun and space junk can be "long-lived" when sunspot activity drops to the low point of the 11-year solar cycle.

NASA is hoping to execute a nighttime rocket launch that's designed to create artificial glowing clouds. These could be visible to millions of people along the U.S. East Coast tonight (June 18).

The northern lights shimmer over Europe in a new Space Station photo.

NASA's upcoming sun-studying mission, which will come much closer to Earth's star than any spacecraft in history, has been renamed the Parker Solar Probe, agency officials announced today (May 31).

Mars is dry as a bone today, but the Red Planet once had raindrops bigger than the ones we're used to here on Earth, a new study suggests.

Solar astronomers have uncovered the magnetic secrets behind one of the sun's most mysterious eruptions: a coronal mass ejection that seems to come from nowhere.

Giant eruptions of material and smaller jets from the sun's surface are closer cousins than anyone thought.