Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

Here’s everything you need to know about astrophotography in December 2025: ...

There’s magic in the air this holiday season and there’s also magic in the December night skies. These long nights are ...

When we look up at the starry sky, certain celestial formations have been familiar to us for millennia. The Pleiades, that ...

Just about everybody knows the Pleiades star cluster, also called the Seven Sisters. They represent the daughters of the ancient Greek gods Atlas and Pleione. After Orion's Belt and the Big Dipper, it ...

On November 20, Callisto will begin a transit across the disk of Jupiter at 5:53 A.M. EST. Uranus will reach opposition on November 20 at 7 A.M. EST, presenting the optimal viewing period for the ice ...

I do so love an ostentatious comet. As I wrote in a recent “The Universe” column, when these dusty ice balls are billions of kilometers from the sun, they’re frozen solid. But as they near our star on ...

We saw similar things in a previous interstellar comet, 2I/Borisov, and in some solar system comets.” “The idea that 3I/ATLAS could be an alien spacecraft is simply nonsense. There’s nothing about it ...

Astronomers Uncover the Vast Greater Pleiades Complex with 3,000 Hidden Stars Researchers using Gaia and TESS have found that the Pleiades is part of a far larger 3,000-member stellar complex ...