One of the pillars of Einstein's Relativity is the principle of equivalence: the equivalence of inertial mass and gravitational mass. According to Einstein, the force of gravity keeping your feet on ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Albert Einstein's theory of general relativity has held up pretty well after a century out in the ...

Albert Einstein opened humankind’s eyes to the universe. Before Einstein, space seemed featureless and changeless, as Isaac Newton had defined it two centuries earlier. And time, Newton declared, ...

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Dr. James F. Woodward explains how to build faster-than-light warp drives and even stargates, based on Mach’s principle which would allow spacetime distortions compatible with general relativity. In ...

From smashing particles together to analyzing the properties of a supermassive black hole, much of physics research takes place far beyond the realm of our everyday experience. However, there is one ...

It stands among the most famous theories ever created, but the general theory of relativity did not spring into being with a single, astonishing paper like the special theory of relativity in 1905.

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. General relativity is physicist Albert Einstein's understanding of how gravity affects the fabric ...

When the theory of relativity appeared in the early 1900s, it upended centuries of science and gave physicists a new understanding of space and time. Isaac Newton saw space and time as fixed, but in ...