BOULDER- Black holes, time travel and E= mc^2. They are all related to Albert Einstein's Theory of Relativity. How many of us, though, can actually explain any of it? This year, Einstein's theory ...

Scientists hope to probe the nature of general relativity through a possible pulsar found in the center of the Milky Way, ...

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Relativity Space launched the world's 3D printed rocket on March 22, 2023. Though the rocket failed to reach orbit, it did pass some important milestones on its maiden voyage. "It was, at least from ...

Former Google CEO Eric Schmidt is the new CEO of rocket startup Relativity Space. Founded in 2015, the space firm made headlines for launching the world's first 3D-printed rocket in 2023. Now, the ...

Relativity Space made a flurry of announcements on Wednesday about its past and future. The company is going bigger, and it has already started to do so. In an interview with Ars, the company’s chief ...

For those who watch gravitational waves roll in from the universe, GW250114 is a big one. It's the clearest gravitational wave signal from a binary black hole merger to date, and it gives researchers ...

Relativity Space announced Tuesday morning that it has raised an additional $650 million in private capital and that this money will fuel an ambitious agenda of 3D printing large, reusable rockets.