In 2017, an interstellar object zipped through our solar system and instantly triggered the most predictable headline: aliens. But the real mystery wasn’t the shape—it was the motion. It accelerated ...

An annular eclipse swept over a remote corridor of Antarctica on Feb. 17.

Early on Tuesday, Feb. 26, a rare annular solar eclipse created a “ring of fire” over Antarctica, while South Africa and ...

While idea may violate Occam’s razor, “it remains a speculative but logically open alternative,” says biologist Robert Endres ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

In the medieval period, when Arabic chroniclers recorded eclipses, they usually noted concurrent deaths of rulers. And in Europe, a solar eclipse in 1133 was so closely associated with the 1135 death ...

A stunning “ring of fire” eclipse was totally visible to a lucky few in the Southern Hemisphere. Here’s how to see the next one ...