A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.

A Soviet-era spacecraft has plunged to Earth, more than a half-century after its failed launch to Venus. The half-ton ...

A half-ton spacecraft launched by the Soviet Union 53 years ago is expected to fall back to Earth this weekend.

The Kosmos 482 probe crashed to Earth today (May 10) after circling our planet for more than five decades. Reentry occurred ...

May 23-26 Boulder Creek Festival. Boulder Creek Fest and the annual Bolder Boulder 10K race are Boulder’s official kick-off to summer. Grab the kids and head up U.S. 36 for a weekend filled with food, ...

A new public holiday in France, a new opportunity to enjoy the beautiful museums and monuments near you: this Thursday, May ...

A new study, however, identifies a possible candidate. A separate team of astronomers compared 1983 data from the Infrared ...

In photos The details in this photograph include the airglow of the atmosphere dividing Earth from space — yellow-green at an altitude of 75 miles and a faint reddish hue 250 miles above the ...

A Falcon 9 rocket topped with 28 of the company's Starlink internet satellites launched from NASA’s Kennedy Space Center in ...