Ten years before general relativity, Einstein came up with special relativity, which explained the relationship between space and time – and how they are related to each other. 'Special' means ...

McCrea, W. H., Nature, 216, 122 (1967).

General relativity describes gravitation in a geometrical framework generalizing special relativity and ... a phenomenon that is difficult to explain with existing models.

A theoretical particle that travels faster than light, the tachyon has long intrigued physicists and fueled decades of speculation. Initially conceived as a possible solution to quantum and relativity ...

A European space telescope captured a rare halo of light that circles a galaxy that is 590 million light-years away, which is ...

Hispanolistic / Getty Images A special needs trust is a legal arrangement and fiduciary relationship that allows a disabled or chronically ill person to receive income without reducing their ...

Euclid, the European Space Agency’s dark Universe detective, has made an astonishing discovery – right in our cosmic backyard ...

Mathematical equations have shaped our understanding of the universe, and these nine have played a key role in changing the world.

Astronomers have identified a quasar that may help explain how the universe’s “dark ages” finally ended. Astronomers have ...

explain the principles and equations of Einstein General Relativity, and solve them in some specific cases. explain the basics of thermodynamics and statistical mechanics in an expanding universe.

define the principles and equations that are the foundation of models of the universe in the general theory of relativity. explain important cosmological observations and how they are used to ...