|
Toshkent farmatsevtika instituti fizika, matematika va axborot texnologiyalari kafedrasi
|
| bet | 28/69 | | Sana | 19.03.2017 | | Hajmi | 172,07 Kb. | | #410 |
Cosmological Constant:
A term added by Albert Einstein as a modification to his original theory of general relativity, in order to balance the attractive force of gravity and achieve a static or stationary universe. It represents the possibility that there is a density and pressure associated with apparently empty space, and that the overall mass-energy of the universe is actually much greater than currently estimated. Once dismissed as just a mathematical “fix”, it has been revived in recent years with the discovery of the apparent acceleration of the expansion of the universe.
Cosmological Principle:
The starting point for the General Theory of Relativity and theBig Bang theory is that, that averaged over large distances, one part of the universe looks approximately like any other part, and that, viewed on sufficiently large distance scales, there are no preferred directions or preferred places in the universe. Stated in more technical terms, on large spatial scales, the universe is homogeneous and isotropic.
|
| |
