Because the moon has less gravity than Earth does, time passes slightly differently there. This effect was first predicted by ...

Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

The answer comes from a counterintuitive result of special relativity, a field of physics which is notoriously difficult to ...

Our universe plays by certain rules, which originate from different branches of physics. But sometimes the rules seem ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

See how Relativity's Terran 1 rocket got from the 3D printer to the launch pad in these highlights. Credit: Relativity Space ...

James Yenbamroong, CEO of mu Space, and Tim Ellis, CEO of Relativity, pose with employees upon signing a contract to launch a mu Space satellite on Relativity's Terran 1 rocket in 2022. Credit: ...

Relativity Space says it’s brought in another $500 million in investment to speed up its effort to build entire orbital-class rockets using 3D printing. The startup — which was founded in Seattle less ...