ECKHARD SLAWIK / SCIENCE PHOTO LIBRARY ECKHARD SLAWIK / SCIENCE PHOTO LIBRARY
Waning half Moon. Image 14 of 15. Optical image of a waning (decreasing in apparent size) half Moon twenty-three days into its 28-day cycle. The phases of the Moon are due to it revealing different amounts of its sunlit face as it orbits the Earth. Image taken on 25th June 2000. For a sequence showing the Moon throughout its cycle of phases, see images R340/596-610.
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