Radio Noise from Dust Grains

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Science  25 Jan 2002:
Vol. 295, Issue 5555, pp. 638-639
DOI: 10.1126/science.1067917

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Cosmic dust plays an important role in the evolution of galaxies. Usually, the grains can be detected in the infrared, but as Ferrara explains in his Perspective, experiment and theory now show that spinning cosmic dust grains can also emit radio waves. These emissions provide an important new tool for studies of the interstellar medium in galaxies.