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 ...

SpaceX plans to launch the 11th test flight of its Starship megarocket at 7:15 p.m. EDT (2315 GMT) on Monday (Oct. 13).

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 ...

NASA is looking for new ideas for moon landers to help astronauts return to the surface of the moon as progress for SpaceX's ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...