Winter officially arrives at 10:03 a.m. EST on Dec. 21, bringing the year's longest night and shortest day. While astronomers ...

Every 22 seconds, briefly in the low Earth orbit, there are two satellites moving close, less than a kilometer apart. For ...

I/ATLAS has passed its closest point to Earth, meaning we will soon lose sight of it for good. Some scientists want to send a spacecraft to chase down the alien comet — or the next interstellar object ...

Satellites in orbit would begin to collide in a matter of days if they lost manoeuvrability during a solar storm or other ...

A new study finds that, with the immense quantity of satellites that hurtle in Earth's orbit today, the first smashup would ...

There are few things more American than driving a car really fast in a straight line. Occasionally, the cars will make a few ...

What looked like a mysterious exoplanet was actually the sparkling debris from a violent collision between massive space rocks.

Although the Ursids are active from Dec. 13 through Dec. 26, the peak night coincides with the winter solstice, which occurs at 10:03 a.m. EST on Dec. 21. Though the two events are totally unrelated, ...

The Shadow by Hans Christian Andersen was first published in 1847. In some ways, it is Andersen’s darkest tale. The character the reader is led to believe is the protagonist is known only as “the ...

Our Solar System contains tens of thousands of potentially dangerous asteroids that could wipe out an entire city, or worse. In Washington, a NASA office is leading efforts to spot and neutralize ...