Firing Microwaves Into Space Could Find Dark Matter

Firing Microwaves Into Space Could Find Dark Matter
AP Photo/Illustris Collaboration

A powerful beam of microwaves could be fired into space to detect hypothetical dark-matter particles called axions. That is the proposal of Pierre Sikivie and Ariel Arza at the University of Florida, who hope to record a faint microwave “echo” from the dark matter thought to exist at higher concentrations in certain regions of the Milky Way.

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