For those who watch gravitational waves roll in from the universe, GW250114 is a big one. It's the clearest gravitational ...

Astronomers have found thousands of exoplanets around single stars, but few around binary stars—even though both types of ...

Einstein was awarded the 1921 Nobel Prize for a theory that half of the people might not even have heard of. His Theory of ...

Astronomers have long faced a strange contradiction: most stars are born in pairs, and ...

LIGO's GW250114 signal tests Einstein's relativity, revealing black hole properties and confirming key theorems in ...

Albert Einstein won the 1921 Nobel Prize in Physics, but not for relativity—the theory that made him famous. This article ...

A newly detected gravitational wave, GW250114, is giving scientists their clearest look yet at a black hole collision—and a powerful way to test Einstein’s theory of gravity. Its clarity allowed ...

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 ...

Splitting and recombining an electron wave packet has been used to test relativity at a record sensitivity. The result heralds an era of precision measurements of relativity using quantum-information ...

Rocket builder and 3D-printing specialist Relativity Space is raising $500 million of fresh capital in a new round being led by Tiger Global Management, people familiar with the financing told CNBC on ...

3D-printing rocket builder Relativity Space closed a $500 million round of new capital which CEO Tim Ellis said now gives the company a "war chest" to further advance its technology. "This really ...