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

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

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

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

California-based startup Relativity Space is one of many launch startups, but it stands out for its 3D-printing approach to manufacturing rockets while also pursuing fully reusable rockets. Relativity ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

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 ...

When the first-ever image of a black hole was released in April 2019, it marked a powerful confirmation of Albert Einstein’s theory of gravity, or general relativity. The theory not only describes the ...

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 ...