dark matter

Etymology
, from and. Coined by Swiss astronomer in German in 1933, to account for the apparent mass needed to account for galaxy clusters, where the mass of luminous matter did not add up to enough of a gravitational effect, inferring nonluminous matter must exist to account for the missing mass. The term gained new popularity due to the missing mass found in galaxies to account for galaxy rotation curves discovered by in research published in English in the 1970s.

Noun

 * 1)   which cannot be detected by its radiation but whose presence is inferred from gravitational effects.
 * 2)   which has mass but which does not readily interact with normal matter except through gravitational effects.
 * 1)   which has mass but which does not readily interact with normal matter except through gravitational effects.
 * 1)   which has mass but which does not readily interact with normal matter except through gravitational effects.

Translations

 * Afrikaans:
 * Albanian:
 * Arabic: مَادَّة مَظْلِمَة
 * Armenian: մութ մատերիա
 * Asturian: materia escuro
 * Azerbaijani: qaranlıq maddə
 * Basque: materia ilun
 * Belarusian: цёмная матэ́рыя
 * Bulgarian: тъ́мна мате́рия
 * Catalan: matèria fosca
 * Chinese:
 * Mandarin:
 * Chuvash: тӗксӗм йӑмлӑх
 * Czech: temná hmota
 * Danish: mørkt stof, mørk materie
 * Dutch: donkere materie
 * Esperanto: malluma materio
 * Estonian: tumeaine
 * Faroese: dimmevni
 * Finnish:
 * French: ,
 * Galician:, materia negra
 * Georgian: ბნელი მატერია
 * German:
 * Greek:
 * Hebrew: חומר אפל
 * Hungarian:
 * Icelandic:
 * Ido: materio obskura
 * Indonesian: materi gelap
 * Irish: damhna dorcha
 * Italian:
 * Japanese: 暗黒物質, ダークマター
 * Kannada: ಡಾರ್ಕ್ ಮ್ಯಾಟರ್
 * Kazakh: қараңғы материя
 * Korean: 암흑 물질
 * Latvian: tumšā matērija
 * Lithuanian: tamsioji medžiaga, nematomoji medžiaga, tamsioji materija
 * Macedonian: тéмна матéрија
 * Malay: jirim gelap
 * Norwegian: mørk materie
 * Persian:
 * Polish:
 * Portuguese: matéria escura, matéria negra
 * Romanian: materie întunecată
 * Russian: тёмная мате́рия, скры́тая ма́сса
 * Serbo-Croatian:
 * Cyrillic: тамна тва̑р, тамна ма̀те̄рија
 * Roman: tamna tvȃr, tamna màtērija
 * Sicilian: materia nìvira
 * Slovak: tmavá hmota, temná hmota
 * Slovene: tèmna snóv
 * Spanish:
 * Swedish:
 * Thai:
 * Turkish: karanlık madde
 * Ukrainian: тéмна матéрія
 * Vietnamese: