standard ruler
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Standard ruler — A standard ruler is an astronomical object that has a known size. By measuring its apparent angular size on the sky, one can determine its distance from Earth.An object with a known diameter would look smaller at farther distances, the angular… … Wikipedia
Standard candle — A standard candle is an astronomical object that has a known luminosity. Standard candles are the basis for several important methods of deriving distances in extragalactic astronomy and cosmology in the cosmic distance ladder.TheoryComparing its … Wikipedia
Ruler — For other uses, see Ruler (disambiguation). A variety of rulers A 2 meter … Wikipedia
Marsalis Standard Time, Vol. I — Marsalis Standard Time, Vol. 1 is an album by Wynton Marsalis, released in 1987. The album reached peak positions of number 153 on the Billboard 200 and number 2 on Billboard s Top Jazz Albums chart.[1] See also Wynton Marsalis discography… … Wikipedia
The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… … Wikipedia
Cosmic distance ladder — * Light green boxes: Technique applicable to star forming galaxies. * Light blue boxes: Technique applicable to Population II galaxies. * Light Purple boxes: Geometric distance technique. * Light Red box: The planetary nebula luminosity function… … Wikipedia
Distance Angulaire (Cosmologie) — La distance angulaire est une notion utilisée en cosmologie pour exprimer la distance apparente d’un objet astronomique à partir de son diamètre angulaire. Il ne s’agit pas de la distance réelle à laquelle se situe l’objet en question (voir ci… … Wikipédia en Français
Distance angulaire (cosmologie) — La distance angulaire est une notion utilisée en cosmologie pour exprimer la distance apparente d’un objet astronomique à partir de son diamètre angulaire. Il ne s’agit pas de la distance réelle à laquelle se situe l’objet en question (voir ci… … Wikipédia en Français
Distance diamètre-angulaire — Distance angulaire (cosmologie) La distance angulaire est une notion utilisée en cosmologie pour exprimer la distance apparente d’un objet astronomique à partir de son diamètre angulaire. Il ne s’agit pas de la distance réelle à laquelle se situe … Wikipédia en Français
Sheffield Town Hall — Infobox Historic building caption=Sheffield Town Hall and the Peace Gardens name=Sheffield Town Hall location town=Sheffield location country=ENG client=Sheffield Corporation construction start date=1890 completion date=1897 date… … Wikipedia
