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Home > All Images > 2001 > April > 9 Apr 2001

Images Dated 9th April 2001

Choose from 16 pictures in our Images Dated 9th April 2001 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Waning crescent Moon Featured 9 Apr 2001 Image

Waning crescent Moon

Waning crescent Moon. Image 27 of 27. Optical image of a waning (decreasing in apparent size) crescent Moon 27 days into its 28-day cycle. The lunar phases arise as the Moon's orbit of the Earth shows the Earth-facing side moving into and out of the light of the Sun. This Earth-facing side of the Moon is locked in place by the gravitational influence of the Earth. This results in a lunar day that equals the length of the lunar Earth orbit. On a waning Moon the day-night line (terminator) marks the lunar sunset. The Moon is crescent when it is less than half full. Taken in October 2001. A sequence of the monthly cycle of Moon phases is shown on images R340/644-670