Day of Remembrance honors fallen astronauts with ceremonies nationwide, including wreath-laying at Arlington National Cemetery led by Jim Free and events at various NASA centers.

The data used to create the image is from a Hubble Space Telescope project to capture and map Jupiter's superstorm system.

A wall of ice the size of Rhode Island is lumbering toward a remote island off Antarctica that’s home to millions of penguins and seals.

Scientists think a small rock discovered near Earth last August was hurled into space by an ancient impact on the lunar surface.

Mark Zaid, the D.C. attorney known for handling cases regarding national security, security clearances, government investigations, freedom of speech claims and whistleblowing, responded to President ...

While the planets are technically always "aligned" along the same plane in our sky, seeing so many at once is a special opportunity ...

Discover Chris Bledsoe's extraordinary encounter with a 45-foot egg-shaped UFO. Learn about his experiences, government interest, and upcoming revelations on his son's podcast "Bledsoe Said So." ...

Angry Astronaut and Nextbigfuture commenter are making the case that SpaceX and Elon Musk must switch to nuclear thermal rockets to colonize Mars. I will ...

CFRA Research equity analyst Angelo Zino joins ‘Varney & Co.’ to weigh in on President Donald Trump’s major announcement regarding the artificial intelligence industry.

G3 (ATLAS) showed off its spectacular tail plumage to NASA spacecraft when it flew close to the sun this month.

The sun is at the peak of its 11-year cycle. That means an uptick in solar flares will lead to more chances to see the northern lights over the next couple of years.

Chorus waves are mysterious, chirping signals produced by spiraling plasma inside our planet's magnetic field. But a new detection suggests scientists may understand less about them than first thought ...