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Science 25 January 2002:
Vol. 295. no. 5555, pp. 638 - 639
DOI: 10.1126/science.1067917
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Perspectives

ASTRONOMY:
Radio Noise from Dust Grains

Andrea Ferrara

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.

The author is at the Osservatorio Astrofisico di Arcetri, Largo E. Fermi, 5, 50125 Firenze, Italy. E-mail: ferrara{at}arcetri.astro.it.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)