darkmatterとは 意味・読み方・使い方

語源

Calque of German Dunkle Materie. The term gained new popularity in the 1970s as a result of Vera Rubin's publishing (in English) her discovery that some galaxies did not seem to have enough mass to account for their rotation curves.

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dark matter (uncountable)

1. (astronomy, astrophysics, loosely) Matter which cannot be detected by its radiation but whose presence is inferred from gravitational effects.
   • 2001, Susan M. Fitzpatrick, John T. Brue, Carving Our Destiny: Scientific Research Faces a New Millennium‎:

     The evidence for dark matter in galaxies started to accumulate in the mid-1970s. By the following decade it became clear that essentially all galaxies, including our own Milky Way, are surrounded by extensive halos of dark matter.

   • 2004, L. Bergström, A. Goobar, “Particle Astrophysics and the Dark Sector of the Universe”, in John W. Mason, editor, Astrophysics Update, pages 124–125:

     On large scales like that of clusters of galaxies, gravitational lensing indicates that the dark matter is smoothly distributed, on the average.

2. (particle physics, cosmology, strictly) Matter which has mass but which does not readily interact with normal matter except through gravitational effects.
3. (biology, informal) Unclassified or poorly understood genetic material.

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