from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy, physics Any kind of
astronomicalbody comprising normal baryonicmatter that in sufficient numbers might explain the apparent presence of dark matterin galaxy halos.
from Wiktionary, Creative Commons Attribution/Share-Alike License
Perhaps coined with the acronym, MACHO, in mind. See also WIMP, which represents a competing hypothesis.
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