Astronomy terms starting with V

6 terms

1. Vacuum Energy A theorized energy everywhere in space, arising from quantum mechanics.
2. Variable Stars Stars which brighten and dim, some with precise regularity. For Cepheid variables, their period allows determination of their brightness, and so their…
3. Velocity The rate and direction of change of an object's position. The speed and direction at which something is moving.
4. Visible Light Electromagnetic radiation from about 400 to 700 nm, which is detectable by the hu­man eye.
5. Visible Mass Mass that gives off electromagnetic radiation, so that it can be detected. It is ordinary (baryonic) matter.
6. Visible Universe The part of the entire universe from which light would have had time to reach us in the age of the universe.