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 ...

A splashy California-based launch company named Relativity Space shared a photo of sleek-looking rocket hardware on its social media channels last week. The image featured an impressively large ...

Why can't anything travel faster than the speed of light? Do black holes really suck? And why is the universe expanding? These are just a few of the questions author and astrophysicist Jeffrey Bennett ...

One hundred years ago this Wednesday, Albert Einstein gave the last of a series of presentations to the Prussian Academy of Sciences, which marks the official completion of his General Theory of ...

We've all heard of relativity, but what is it? How does it relate to light and motion? So we've all heard of relativity, right? But... what is relativity? And how does it relate to light? And motion?

Relativity Space has completed a critical design review of its Terran R rocket as it works towards a first launch as soon as late 2026. Credit: Relativity Space WASHINGTON — The former chief executive ...

Physicists have long treated space and time as the stage on which quantum particles perform, not as actors in the drama ...

The revised version of the Terran R features increased performance, but will only reuse the first stage. Credit: Relativity Space WASHINGTON — Relativity Space has decided to retire its Terran 1 small ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the ...

There are only a few ideas that are powerful enough to shape our entire picture of the Universe and how it works: gravitation, the laws of motion, electricity and magnetism, quantum mechanics. Yet a ...

Relativity Space said Monday that the company has successfully completed a full-duration test-firing of its Aeon 1 rocket engine, running it at full power for 187 seconds. The test at NASA’s Stennis ...