Pointed away from Earth about 404 miles overhead, the orbital observatory will circle the planet from north to south about 14 ...

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

At 300 light-years away, the interstellar cloud is the closest of its kind ever found to Earth and the largest apparent single structure in the sky.

NASA's SPHEREx space observatory has spent the last six weeks undergoing checkouts, calibrations, and other activities to ...

The most advanced instrument on the most powerful solar telescope ever built delivered first-light images with incredible ...