Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
There are 2759 entries in this glossary.| Term | Definition |
|---|---|
| Schwarzschild Radius |
The critical radius at which the spacetime surrounding a sphere becomes so curved that it wraps round to enclose the body. An object that has collapsed inside its Schwarzschild radius is a black hole, from which nothing can escape into the outside world. The Schwarzschild radius for an object the mass of the Sun is 3 kilometres; for an object the mass of the Earth it is 1 centimetre.
|