Time feels like the most familiar thing in the world, yet it hides one of physics’ hardest questions: why do we only remember ...

A newly developed solution to the equations at the heart of Albert Einstein's most revolutionary theory suggests hypothetical stars called "nestars" could be made from stacked gravitational stars, or ...

A new solution to Albert Einstein's theory of general relativity suggests hypothetical gravitational stars that look like black holes could be nested within one another. When you purchase through ...

Using software that incorporates all of the field theory equations developed by Einstein as part of his general theory of relativity, research teams from Europe and the United States have started ...

New impressions A visualization of a curved space–time “sea” from the general-relativity simulations carried out by the authors.(Courtesy: James Mertens) From the Genesis story in the Old Testament to ...

Einstein’s equations were written for chalkboards and paper, yet they now sit at the heart of some of the most visually ...

Mathematical equations aren't just useful -- many are quite beautiful. And many scientists admit they are often fond of particular formulas not just for their function, but for their form, and the ...

Gravity pulls objects together; the closer they are, the stronger the pull. Energy and mass are equivalent and interchangeable (E=mc²). The universe's expansion speed is linked to a galaxy's distance.