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 ...

The next full moon will be on Saturday, Jan. 3, 2026. It will officially reach its full moon phase at 5:03 a.m. EST (1003 GMT ...

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

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

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

Studying samples from the Bennu asteroid, researchers have found sugars essential for biology, stardust and ... something ...

If it feels like the last month of the year has kicked off on an especially dramatic note, you’re simply feeling the vibes of ...

If you are into planets and also like to get up pre-dawn (much easier in the Northern hemisphere now that it is winter here), ...

One recent morning, our car follows a dirt path to Farrow Ranch, a 75-acre property tucked away in Sonoma ’s Alexander Valley ...

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

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