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 ...

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 ...

THE number of systematic treatises on relativity is not unduly large. This is partly because, since the first few years after Einstein's announcement of the 'general' theory in 1917, it has undergone ...

Relativity Space, a private company with ambitions for sending people to Mars, made it off the launchpad, but the vehicle experienced problems during the second stage of its flight. By Oliver Whang ...