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Halley's Confounding Fireworks

Kerr, Richard A.

The intensive worldwide campaign of observations of Halley's Comet repeatedly yielded data, particularly imagery, of sudden outbursts from the Comet. IUE data for Dec. 24, 1985 showed a brightness increase in the central coma by a factor of 2-3 over a 1-2 day period, followed shortly thereafter by spectra indicating a surge of ionized CO2 150,000 …