massive compact halo object

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English[edit]

Alternative forms[edit]

Etymology[edit]

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

Noun[edit]

massive compact halo object (plural massive compact halo objects)

  1. (astronomy, 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.

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Hypernyms[edit]

  • dark matter (non-luminous matter needed to balance the orbital speeds observed in stars in galaxies with the observed luminous mass of the galaxy in question)

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