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MPEG-1  |  2012-12-18  |  13.5 MB  |  320x240  |  29.97fps  |  1 minute, 6 seconds
Transcription: Neptune is the eighth planet from the Sun and as you can see in this side-by-side comparison, it's about four times the size of planet Earth. Neptune's blue color is due mostly to the fact that methane in Neptune's atmosphere absorbs red light. So when white light coming from the Sun hits Neptune and gets reflected back to Earth, the red is removed. As a result, the light looks very blue. Its composition is most likely like that of Uranus. Interestingly enough, enough, just like Jupiter has a great red spot, Neptune has a great dark spot shown in the picture here. Neptune rotates about its axi ...