dark matter

(redirected from Missing mass problem)
Also found in: Thesaurus, Encyclopedia.
Related to Missing mass problem: dark matter

dark matter

n.
Matter that emits little or no detectable radiation of its own, postulated to account for observed gravitational forces that affect astronomical objects but have no observable sources. Dark matter is thought to be part of the missing mass.

dark matter

n
(Astronomy) astronomy matter known to make up perhaps 90% of the mass of the universe, but not detectable by its absorption or emission of electromagnetic radiation

dark′ mat`ter


n.
a hypothetical form of matter invisible to electromagnetic radiation, postulated to account for gravitational forces observed in the universe.
[1920–25]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dark matter - (cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force
matter - that which has mass and occupies space; "physicists study both the nature of matter and the forces which govern it"
cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe
weakly interacting massive particle, WIMP - a hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation; postulated as a constituent of the dark matter of the universe
Translations

dark matter

n (Astron) → dunkle Materie, Dunkelmaterie f
References in periodicals archive ?
"So, if dark matter is not present where we expected it, a new solution for the missing mass problem must be found.
The missing mass problem is one of the conundrums of modern astrophysics.
They write, "It is well established that if there is about 10 times as much molecular hydrogen as atomic hydrogen in the disks of spiral galaxies, then the missing mass problem [in galaxies] is solved."

Full browser ?