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Comet Halley begins to show its tail.

Comet Valley is finally showing signs of its developing tail. The fuzzy "coma" produced as the sun's heat frees dust and ice particles from the comet's frozen nucleus has been visible for months, but the viewing angle from earth has made the tail difficult to identify. The comet has been under scrutiny since it was spotted three years ago on the way to its first rendezvous with the sun since 1910 (SN: 10/30/82, p. 277). This photo was taken on Sept. 25 by James Gibson of Jet Propulsion Laboratory in Pasadena, Calif., using the 60-inch telescope at Palomar Observatory and a red filter to ehnahce light reflected from the tail's dust.
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Publication:Science News
Date:Oct 19, 1985
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