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Europa
Wallpaper Description:
Jupiter's icy moon Europa is slightly smaller than the Earth's moon. Like the Earth, Europa is thought to have an iron core, a rocky mantle, and a surface ocean of salty water. Unlike on Earth, however, this ocean is deep enough to cover the whole surface of Europa, and being far from the Sun, the ocean surface is globally frozen over. Europa orbits Jupiter every 3.5 days and is phase locked -- just like Earth's moon -- so that the same side of Europa faces Jupiter at all times. However, because Europa's orbit is eccentric (i.e. an oval not a circle) when it is close to Jupiter the tide is much higher than when it is far from Jupiter. Thus tidal forces raise and lower the sea beneath the ice, causing constant motion and likely causing the cracks we see in images of Europa's surface from visiting robotic probes. This "tidal heating" causes Europa to be warmer than it would otherwise be at its average distance of about 780,000,000 kilometers (485,000,000 miles) from the sun, more than five times as far as the distance from the Earth to the Sun. The warmth of Europa's liquid ocean could prove critical to the survival of simple organisms within the ocean, if they exist. It was also a moon not to be touched by man on the movie A Space odyssey 2001.
leo19
Uploaded by leo19 on
Aug 13, 2010 .
Europa - Desktop Nexus Space
Download free wallpapers and background images: Europa. Desktop Nexus Space background ID 426447. Jupiter's icy moon Europa is slightly smaller than the Earth's moon. Like the Earth, Europa is thought to have an iron core, a rocky mantle, and a surface ocean of salty water. Unlike on Earth, however, this ocean is deep enough to cover the whole surface of Europa, and being far from the Sun, the ocean surface is globally frozen over. Europa orbits Jupiter every 3.5 days and is phase locked -- just like Earth's moon -- so that the same side of Europa faces Jupiter at all times. However, because Europa's orbit is eccentric (i.e. an oval not a circle) when it is close to Jupiter the tide is much higher than when it is far from Jupiter. Thus tidal forces raise and lower the sea beneath the ice, causing constant motion and likely causing the cracks we see in images of Europa's surface from visiting robotic probes. This "tidal heating" causes Europa to be warmer than it would otherwise be at its average distance of about 780,000,000 kilometers (485,000,000 miles) from the sun, more than five times as far as the distance from the Earth to the Sun. The warmth of Europa's liquid ocean could prove critical to the survival of simple organisms within the ocean, if they exist. It was also a moon not to be touched by man on the movie A Space odyssey 2001.
Rating: 4.2
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Wallpaper Statistics
Total Downloads: 527
Times Favorited: 5
Uploaded By:
leo19
Date Uploaded: August 13, 2010
Filename: europa.jpg
Original Resolution: 1920x1200
File Size: 837.66KB
Category:
Moons
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