In the story, Comet Gallia appears sometime in the eighteen seventies. This is changed to 1880-82, since the orbit Verne described did not match the reality of our solar system very well: having it happen in that decade would make it behave more or less like a pinball game, defying all physical laws...
Because of this, the dates in the book are invalid compared to JTPS. Here´s the timeline, revised for Celestia:
- December 24, 1872:
Comet Gallia enters the Solar System
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December 31, 1877:
Neptune flyby
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January 01, 1880:
The comet encounters Earth. Bits of land from the Mediterranean basin scooped up by the impact
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March 09, 1880:
Perihelion
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April 18, 1880:
Venus flyby
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November 11, 1880:
Jupiter flyby
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November 15, 1880:
Servadac´s company moves to Nina´s Hive. Dobryna abandoned
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January 01, 1881:
Saturn flyby
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February 19, 1881:
Aphelion
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September 21, 1881:
Acquisition of the asteroid Nerina
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November 26, 1881:
Mars flyby
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December 15, 1881:
Loss of Nerina, Gibraltar in free fall
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December 24, 1881:
Servadac´s company constructs the balloon
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December 31, 1881:
Gibraltar flyby of Earth´s Moon
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January 01, 1882:
Earth flyby. The balloon flies
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January 01, 1889:
Gallia leaves the Solar System
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Neptune / Triton flyby
At Saturn: a room with a view...
Loss of Nerina
The flight home
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Neptune / Triton flyby
At Saturn: a room with a view...
Loss of Nerina
The flight home