Astronomers have located a rare exoplanet on the edge of the Milky Way.

There are new hints that the fabric of space-time may be made of "memory cells" that record the whole history of the universe ...

Binary neutron star mergers, cosmic collisions between two very dense stellar remnants made up predominantly of neutrons, ...

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An illustration of the cosmic web, the universe’s large-scale structure of composed of galaxy-rich clumps and filaments alongside giant intergalactic ...

For centuries, we have been taught that gravity is a force pulling objects toward the Earth and other massive bodies. However ...

A researcher throws cold water on a recent effort that purported to eliminate black holes' greatest and most enduring mystery ...

Important to any analogy is an understanding of its limitations. Some flaws are obvious: A balloon is small enough to fit in ...

On May 29, 1919, a total solar eclipse helped to prove Albert Einstein's theory of general relativity. Einstein's theory suggested that gravity could bend light by curving the fabric of spacetime. To ...

The general theory of relativity, Einstein asserted, was now complete. The month leading up to the historic announcement had been the most intellectually intense and anxiety-ridden span of his life.