December brings an array of night sky events including a mysterious interstellar comet, the Geminids meteor shower and winter ...

As the winter solstice approaches, North America is closing in on the shortest day of the year -- and in many places, the amount of daylight lost since summer adds up to hours.

NASA is sending two spacecraft to Mars on their new ESCAPADE mission to reveal how space weather robbed it of its atmosphere and turned it dry ...

Stars form in massive clouds of gas called molecular clouds. As they form, they accrete gas from these clouds, and as the ...

Our planet’s magnetosphere has seen dramatic shifts across its history—even total reversals—but this recent wrinkle doesn’t ...

Hole in the Sky, by Daniel H. Wilson, is one of Scientific American’s best fiction picks of 2025. In the novel, aliens talk ...

We have all the latest images of our interstellar visitor from ESA's Juice, Hubble, NASA's STEREO, and even a photobomb from ...

A video posted by the Russian blog site MilitaryRussia.ru on Telegram and widely shared on other social media platforms ...

The Hubble captured the image on November 30, while Juice caught a glimpse of the interstellar visitor shortly after ...

Wausau Pilot & Review staff Tonight in central Wisconsin, the full “Cold Moon” — the second-largest full moon of 2025 and a ...

Skywatchers will get a bright send-off to 2025’s lunar calendar this week when December’s cold moon rises as the last ...

December’s supermoon will become 100 percent full at 6:14 p.m. Eastern time on Thursday, the third consecutive supermoon to ...