Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

The belt of satellites and debris surrounding our planet has just received its first formal "health assessment." The European ...

How many times have you said, “I wish the days were longer”? Well, NASA scientists say the construction of China’s Three ...

When an asteroid threatens Earth, astronomers use a rating called the Torino scale to communicate the risk. Richard Binzel, ...

A new quasi-satellite, 2025 PN7, has been discovered, joining a group of asteroids that orbit the Sun alongside Earth. These 'Arjuna' asteroids mainta ...

Jessie (@littlejar) went viral for unveiling her so-called “Men Diagram,” a Venn diagram consisting of three overlapping circles, which is meant to encapsulate all possible types of men, starting with ...

As NASA prepared astronauts for its second mission into space, National Geographic had exclusive behind-the-scenes access for ...

Scientists have debunked viral claims that the interstellar object 3I/ATLAS dropped 'probes' toward Earth, explaining that ...

California-based start-up Reflect Orbital has applied for a government license to launch a giant mirror to space next year. The mission is meant to be the first step in the company's ambitious plan to ...

Ask someone where outer space is, and they’ll probably point at the sky. It’s up, right? Simple. Except, no one really knows where “air space” ends and “outer space” begins. That might sound trivial, ...