MACHO

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A MACHO, or massive compact halo object, is a localized mass that has a gravitational influence on the matter around it but does not emit any light. Black holes and brown dwarf stars are examples of MACHOs. MACHOs were once thought to make a significant contribution to dark matter; however, … (read more)

A MACHO, or massive compact halo object, is a localized mass that has a gravitational influence on the matter around it but does not emit any light. Black holes and brown dwarf stars are examples of MACHOs. MACHOs were once thought to make a significant contribution to dark matter; however, gravitational lensing surveys have demonstrated that most of the dark matter must be something else.


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