Astronomers have detected mysterious X-ray signals coming from a nearby white dwarf star for more than 40 years. We may now ...

In 1915, Einstein published his paper on general relativity, a theory of gravitation. While Newton’s gravity explained ...

A weak gravitational field indicates nearly flat space-time, and there Newton's theories seem to apply. But a strong gravitational field throws classical predictions off. Einstein postulated three ...

This was incredibly shocking to a world that saw Newton's laws of physics as sacrosanct. Everyone knew that space had three dimensions, and time only one. But Einstein put them together in one ...

Isaac Newton built on many of Galileo's insights when developing his laws of motion. These ideas would later play a critical role in Einstein's thinking about energy, mass, light, and motion.

Ten years later, in 1915, Einstein made up for the omission with his general theory of relativity, which amended Newton’s laws by redefining gravity. General relativity revealed that space and ...

Ten years later, in 1915, Einstein made up for the omission with his general theory of relativity, which amended Newton's laws by redefining gravity. General relativity revealed that space and ...

Newton didn’t believe objects affected space, the American Museum of Natural History writes, but Einstein did, and had even distinguished a fourth dimension known as space-time in his 1905 ...