massive compact halo object meaning: definition, etymology

massive compact halo object

noun

Etymology Perhaps coined with the acronym, MACHO, in mind. See also WIMP, which represents a competing hypothesis.

Astronomy, Natural sciences, Physical sciences, Physics Any kind of astronomical body comprising normal baryonic matter that in sufficient numbers might explain the apparent presence of dark matter in galaxy halos.

Synonyms: MACHO
Derived terms: MACHO
Hypernyms: dark matter
Coordinate terms: weakly interacting massive particle, strongly interacting massive particle, robust associations of massive baryonic objects