An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Number of Results: 2 Search : cosmological principle
cosmological principle
  پروز ِ کیهان‌شناسیک، ~ کیهان‌شناختی   
parvaz-e keyhânšenâsik, ~ keyhânšenâxti

Fr.: principe cosmologique   

The → hypothesis that on → large scales the → Universe is → isotropic and → homogeneous, that is, it appears the same at all places and, from any one place, looks the same in all directions. See also → perfect cosmological principle.

Introduced by E.A. Milne in 1933; → cosmological; → principle.

perfect cosmological principle
  پروز ِ کیهان‌شناسیک ِ فرساخت   
parvaz-e keyhânšenâsik-e farsâxt

Fr.: principe cosmologique parfait   

The → assumption, adopted by the → steady-state theory, that all observers, everywhere at all times, would view the same large-scale distribution of matter in the → Universe in all regions and in every direction. In contrast to the → cosmological principle, the perfect cosmological principle adds the assumption that the Universe does not change with time on the large scale.

perfect; → cosmological; → principle.