Cool Geo-Pic: Earth and the Moon

Cool Geo-Pic: Earth and the Moon

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Another from NASA's Earth Observatory.

"Cut & Paste" Highlights:

" ... Among the leading criteria for habitable planets is the presence of liquid water. How would you know from a distance of 10 million or more miles that Earth had oceans? “A ‘sun glint’ can be seen in the movie, caused by light reflected from Earth’s oceans, and similar glints [if they were observed] from extra-solar planets could indicate alien oceans, ..."

Full Article:

http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=18096

References:

NASA. (2008, July 17). NASA’s Deep Impact Films Earth as an Alien World. Accessed July 21, 2008.
NASA images and animation courtesy EPOXI science team. Caption by Rebecca Lindsey, adapted from the NASA press release.