Oftentimes, we think of space as an endless, mostly empty vacuum, a silent backdrop where planets, stars, and galaxies play out their dance. We also think of time as something separate, a steady ...

"Space jellyfish" leave an ethereal shape in the sky. In rare cases, sometimes the space jellyfish-shaped rocket contrail that follows a launch can transform into another shape. Like a heart. The ...

What if our biggest idea about reality is built on a hidden misunderstanding? A new philosophical look at space-time challenges the popular view that the past, present, and future all exist together ...

Whether space-time exists should neither be controversial nor even conceptually challenging, given the definitions of “space-time,” “events” and “instants.” The idea that space-time exists is no more ...

A coalition of scientists and historians are floating a long-shot plan to retrieve orbiting relics—raising questions about what is space junk or space treasure. Orbital space is full of retro ...

If you’ve seen illustrations or models of the solar system, maybe you noticed that all the planets orbit the Sun in more or less the same plane, traveling in the same direction. But what is above and ...