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 ...

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

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 ...

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

Studying samples from the Bennu asteroid, researchers have found sugars essential for biology, stardust and ... something NASA is calling "space gum?" ...

As much of a toxic place as the internet can be, you can also learn something new every time you go online. Such pieces of ...

We hope you enjoyed the Supermoon last night. The last full Moon of the year was quite splendid from our location, and it's just one of the lovely things that will be visible in the sky this month.

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 ...

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

Until about August 2023, the basin was devoid of water and was a flat plain spattered with bone-dry salts.

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