## Einstein's Equations

A set of "tensor" equations Einstein devised to describe how mass warps spacetime. The set of equations may be written as $$G = 8 π T$$, where both $$G$$ and $$T$$ each represent a set of ten quantities. The $$G$$ quantities represent the warping of spacetime, while the $$T$$ quantities — the "Stress-Energy tensor" represent the mass.

## Inspiration

In the 1st year of the period Chih-ho, the 5th moon, the day chi-ch'ou, a guest star appeared...

Yang Wei-T'e, Imperial Astronomer of the Sung Dynasty, 1054 A.D.

## Featured Video

The SXS project is a collaborative research effort involving multiple institutions. Our goal is the simulation of black holes and other extreme spacetimes to gain a better understanding of Relativity, and the physics of exotic objects in the distant cosmos.

The SXS project is supported by Canada Research Chairs, CFI, CIfAR, Compute Canada, Max Planck Society, NASA, NSERC, the NSF, Ontario MEDI, the Sherman Fairchild Foundation, and XSEDE.

## Our Latest Tweet

RT @KeefeMitman: Nearly 50 years ago, my advisor, Saul Teukolsky, showed how a perturbed black hole rings down to a state of equilibrium. T…