During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String ...

In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time ...

The Einstein field equations are a system of second order, non-linear, coupled differential equations in 4 variables. As you can imagine, solving such a system is not easy. If the system possesses a ...

If dark energy is weakening, it stands to reason that eventually gravity will become dominant and the universe will begin to ...

Special relativity and Lorentz transformations; Scalar and electromagnetic fields; Curved spacetime and the metric tensor; The equivalence principle; Geodesics, covariant derivatives, and Killing ...

A new model has been proposed that challenges the long-standing belief that black holes contain a singularity, a region where space and time break down. This theory suggests that black holes could ...

A new theory links gravity to quantum entropy and introduces the G-field, possibly explaining dark matter and cosmic ...

All of this is calculated with the equations that underpin general relativity: Einstein's field equations. "The way that the space-time curves is determined by the Einstein field equations ...