View of Earth from the moon's horizon as captured from the Apollo 11 command module on July 1969.
Europa is the smallest of the four Galilean moons orbiting Jupiter, and the sixth-closest to the planet. It is also the sixth-largest moon in the Solar System. The image shows the stunning diversity of Europa’s surface geology. Long, linear cracks and ridges crisscross the surface, interrupted by regions of disrupted terrain where the surface ice crust has been broken up and re-frozen into new patterns.
Space Scene
They might look like trees on Mars, but they're not. Groups of dark brown streaks have been photographed by the Mars Reconnaissance Orbiter on melting pinkish sand dunes covered with light frost. The above image was taken in 2008 April near the North Pole of Mars. At that time, dark sand on the interior of Martian sand dunes became more and more visible as the spring Sun melted the lighter carbon dioxide ice. When occurring near the top of a dune, dark sand may cascade down the dune leaving dark surface streaks.
Space Scene
Once upon a time, Mars had lakes, or at least wetter conditions than it does today. The latest from NASA’s Curiosity Mars rover shows slabs of rock cross-hatched with shallow ridges that likely originated as cracks in drying mud, evidence of an ancient era when these sediments were deposited were.
Space Scene
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