File:Heliogyro halley.jpg: Revision history

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23 April 2023

  • curprev 18:1318:13, 23 April 2023‎ THESABERLION talk contribs‎ 152 bytes +152‎ The heliogyro solar sail concept with 12 spinning blades that were each four miles long. Here, the spacecraft approaches Halley’s Comet.
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