Massive compact halo object
ASTRONOMICAL BODY THAT MIGHT EXPLAIN THE APPARENT PRESENCE OF DARK MATTER IN GALAXY HALOS; BODY COMPOSED OF NORMAL BARYONIC MATTER THAT EMITS LITTLE OR NO RADIATION AND DRIFTS THROUGH INTERSTELLAR SPACE UNASSOCIATED WITH ANY PLANETARY SYSTEM
MACHO; MACHOs; Massive Compact Halo Object; Massive compact halo objects; MaCHO; Massive astrophysical compact halo object; Massive Compact Halo Objects; MACHOS; Macho dark matter
A massive astrophysical compact halo object (MACHO) is a kind of astronomical body that might explain the apparent presence of dark matter in galaxy halos. A MACHO is a body that emits little or no radiation and drifts through interstellar space unassociated with any planetary system (and may or may not be composed of normal baryonic matter).