Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what ...

It came from outer space. Interstellar space, to be precise. From somewhere beyond the influence of our sun, possibly from ...

Breakthroughs, discoveries, and DIY tips sent every weekday.

Space telescopes are typically optimized either to study a small patch of the sky across many wavelengths of light or to ...

Every December, Earth plows through a dusty lane of debris in space, and the night becomes illuminated by streaks of meteors.

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, ...

Everyone's favorite interstellar comet, 3I/ATLAS, flew past Earth overnight, coming within about 168 million miles (270 million kilometers) of our planet.

Comet 3I/ATLAS represents just the third object in history to be known to have entered our solar system from outside.