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File:Earth-Moon.png

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Original file (14,476 × 480 pixels, file size: 396 KB, MIME type: image/png)

Summary

Description

Line below Earth represents distance of Earth's centre from the system barycentre. Line below the Moon represents perigee and apogee with the moon at the semi‐major axis position. Moon shown with correct side facing earth, but without any pretty shading. The below information refers to the original version of this file, which was twice the size of the current version (i.e. it's now 14.25 km/px). Sorry but Photoshop wasn't saving them very well, so I had to switch to GraphicConverter, which is limited to 16,000 pixels across. Earth-Moon system at a scale of 7.1224 km/px (0.140402 px/km)

  • Earth polar diameter = 12,713.5 km (893px) ⇒ 7.1224 km/px
  • Moon equatorial diameter = 3,476.2 km (244px)
  • Lunar apogee = 405696 km (28480px)
  • Lunar semi‐major axis = 384400 km (26985px)
  • Lunar perigee = 363104 km (25490px)
  • System barycenter = 4700 km (330px) Scale chosen because Photoshop only supports images 30,000 pixel in width, and scaling the Earth by 50% just about fits with this, all other measurements derived from there.
Date
Source Own work
Author Nickshanks
Other versions
Image extraction processThis file has an extracted image: Earth Eastern Hemisphere.jpg.
lang=en

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This file is licensed under the Creative Commons Attribution 2.5 Generic license.
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inception

2 February 2006

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image/png

File history

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Date/TimeThumbnailDimensionsUserComment
current01:57, 2 February 2006Thumbnail for version as of 01:57, 2 February 200614,476 × 480 (396 KB)NickshanksHalved all dimensions so I could open/re‐save in GraphicConverter and run pngcrush.
01:43, 2 February 2006Thumbnail for version as of 01:43, 2 February 200628,952 × 960 (1.46 MB)NickshanksRe‐saved without interlacing. Size smaller and hopefully Wikipedia will be able to rescale without artifacts.
01:31, 2 February 2006Thumbnail for version as of 01:31, 2 February 200628,952 × 960 (1.94 MB)NickshanksEarth-Moon system at a scale of 7.1224 km/px (0.140402 px/km) * Earth polar diameter = 12,713.5 km (893px) ⇒ 7.1224 km/px * Moon equatorial diameter = 3,476.2 km (244px) * Lunar apogee = 405696 km (28480px) * Lunar semi‐major axis = 384400 km (269

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