A erupted with M1 and M6 class solar flares. Watch the fireworks in these views from NASA's Solar Dynamics Observatory.

A NOAA forecast suggest that Northern Lights may be visible in northern U.S. states this weekend during a G2 geomagnetic ...

President Trump's plans for wide-scale celebrations to commemorate the nation's 250th birthday got underway on New Year's Eve with the illumination of the Washington Monument on the National Mall.

ABC's New Year's Eve show is back and better than ever, featuring hosts Ryan Seacrest, Rita Ora, Chance the Rapper, Rob ...

It’s the greatest cosmic murder mystery of the year: How did a black hole destroy a star—and what kind of black hole is the culprit? Normally, so-called “gamma ray bursts,” sudden flashes of extremely ...