File:Proposed heliogyro mission to Halley's Comet.png

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Summary

Description	English: Proposed design for a heliogyro solar sail spacecraft intended to rendezvous with Halley's Comet in 1986. The design featured 12 blades in two stacks of six, with each blade 8 meters wide and 6.2 kilometers long, deployed and kept extended by rotating the spacecraft. Spacecraft attitude control and steering would be accomplished by varying the pitch of the blades, allowing it to fly into the solar wind. See https://www.centauri-dreams.org/2017/05/05/remembering-the-sail-mission-to-halleys-comet/ for some additional details.
Date	1976
Source	http://www.planetary.org/multimedia/space-images/spacecraft/heliogyro-solar-sail.html (image link)
Author	NASA/JPL-Caltech

Licensing

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	08:41, 6 July 2019		4,000 × 3,001 (5.33 MB)	Huntster	Overwrite per discussion with original uploader. Original NASA file.
	18:39, 18 December 2018		796 × 317 (120 KB)	Rowan Forest	User created page with UploadWizard