Sunday, August 14, 2011
Halley's Comet has an extremely elliptical orbit around the Sun, with an eccentricity of 0.967. Its average oR
Halley's Comet has an extremely elliptical orbit around the Sun, with an eccentricity of 0.967. Its average orbital radius is 17.8 AU, and it was last observed in 1986. When will Halley's Comet appear next?
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