The red region in this image of interstellar clouds highlight microwaves from fast-spinning dust specks found in the Milky Way galaxy—spinning more than ten billion times a second, astronomers announced. The odd radiation has long been associated with dense, dusty clouds between stars, but its exact source was a mystery. Finding the source of the microwave fog will ultimately help the Planck team refine its studies of the cosmic microwave background, or CMB, radiation that was emitted during the big bang, more than 13 billion years ago. Scientists found the tiny grains—each just 10 to 50 atoms wide—using the...
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