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 ...

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 ...

That’s the subject of astrophysicist and “Cosmos” host Neil deGrasse Tyson’s upcoming lecture at the University of Virginia’s ...

Humans have been in space onboard the ISS continuously for 25 years. As the station nears its end, new commercial habitats ...