Astrophysics, Cosmology & Relativity

4 terms

The continuous evolutionary diagonal band on the Hertzsprung-Russell diagram containing stars fusing hydrogen into helium in their cores.

The fundamental relativistic principle stating that mass and energy are directly proportional and interchangeable physical quantities.

The flat four-dimensional spacetime manifold combining 3D Euclidean space and time used to formulate Special Relativity.

A hypothetical set of multiple co-existing universes that together comprise all of physical reality.