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Dark matter (Astronomy)
Nonluminous matter (Astronomy)
Unobserved matter (Astronomy)
Unseen matter (Astronomy)
g
Interstellar matter
Work cat.: Tucker, W.H. The dark matter : contemporary science's quest ... in our universe, 1988.
Facts file dict. astron.
(Matter that comprises 90% of the mass of the universe but is undetectable except by its gravitational effects.)
INIS: Thes.
(Prefers: Nonluminous matter; also, see references: Unobserved matter; Unseen matter)
LC database, Nov. 16, 1987.
NASA
(Dark matter)
Britannica Micro.;
Conc. encyc. astron.;
Dict. astron., space & atmos. phen.;
Encyc. astron.;
Gloss. astron. & astrophysics;
INSPEC;
New space encyc.;
Web. 3