At its perihelion in february 1986 comet halley was 879107
at its perihelion in February 1986, comet Halley was 8.79*10^7 km from the sun and was moving at 54.6 km/s. What was its speed when it crossed Neptune's orbit in 2006?
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at its perihelion in february 1986 comet halley was 879107 km from the sun and was moving at 546 kms what was its speed
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