File:Navigating Space by the Stars.webm

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Original file ‎(WebM audio/video file, VP9/Opus, length 1 min 44 s, 1,280 × 720 pixels, 1.55 Mbps overall, file size: 19.2 MB)

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Description
English: A tool that has helped guide sailors across oceans for centuries is now being tested aboard the International Space Station as a potential emergency navigation tool for guiding future spacecraft across the cosmos. The Sextant Navigation investigation tests use of a hand-held sextant aboard the space station.

Sextants have a telescope-like optical sight to take precise angle measurements between pairs of stars from land or sea, enabling navigation without computer assistance. NASA’s Gemini missions conducted the first sextant sightings from a spacecraft, and designers built a sextant into Apollo vehicles as a navigation backup in the event the crew lost communications from their spacecraft. Jim Lovell demonstrated on Apollo 8 that sextant navigation could return a space vehicle home. Astronauts conducted additional sextant experiments on Skylab.

Read more about the Sextant experiment happening aboard the space station: https://www.nasa.gov/mission_pages/station/research/news/Sextant_ISS

HD Download: https://archive.org/details/jsc2018m000418_Navigating_Space_by_the_Stars
Date
Source YouTube: Navigating Space by the Stars – View/save archived versions on archive.org and archive.today
Author NASA Johnson

Licensing

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Public domain 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.)
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Date/TimeThumbnailDimensionsUserComment
current21:13, 27 December 20231 min 44 s, 1,280 × 720 (19.2 MB)DarwIn (talk | contribs)Imported media from https://www.youtube.com/watch?v=LVqjvvLO5XY

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Format Bitrate Download Status Encode time
VP9 720P 2.43 Mbps Completed 21:21, 27 December 2023 3 min 4 s
Streaming 720p (VP9) 2.3 Mbps Completed 21:26, 27 December 2023 8 min 16 s
VP9 480P 1.27 Mbps Completed 21:45, 27 December 2023 1 min 42 s
Streaming 480p (VP9) 1.18 Mbps Completed 21:46, 27 December 2023 2 min 5 s
VP9 360P 680 kbps Completed 21:44, 27 December 2023 1 min 7 s
Streaming 360p (VP9) 574 kbps Completed 21:43, 27 December 2023 1 min 4 s
VP9 240P 413 kbps Completed 21:42, 27 December 2023 51 s
Streaming 240p (VP9) 308 kbps Completed 21:42, 27 December 2023 49 s
WebM 360P 1.15 Mbps Completed 21:44, 27 December 2023 54 s
Streaming 144p (MJPEG) 992 kbps Completed 21:42, 27 December 2023 7.0 s
Stereo (Opus) 107 kbps Completed 21:44, 27 December 2023 5.0 s
Stereo (MP3) 128 kbps Completed 21:44, 27 December 2023 7.0 s

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