This image of complex patterns on Occator Crater's floor on Ceres was obtained by NASA's Dawn spacecraft on July 5, from an altitude of about 32 miles 52 kilometers. Complex Patterns on Occator Crater's Floor. This image shows the first flash of sunlight reflected off a hydrocarbon lake on Saturn's moon Titan. The glint off a mirror-like surface is known as a specular reflection. This kind of glint was d Reflection of Sunlight off Titan Lake.
Dione looms large before the rings of Saturn. Atlas 32 kilometers, or 20 miles across can be spotted to the lower left of the larger moon, peeking out from behind the rings.
This view looks tow Inclined Dione. Cassini Noodle Mosaic of Saturn. Saturn's moon Mimas, whose low density suggests that it is primarily composed of ice, has a flattened or oblate shape reminiscent of Saturn's see Saturn in Color. The moon's equatorial dimension Not Quite Round. This graphic shows the planned trek of NASA's Dawn spacecraft from its launch in through its arrival at the dwarf planet Ceres in early Journey to Ceres.
The change in Titan's haze layer is illustrated in this figure, derived from data obtained by NASA's Cassini spacecraft. The picture of Titan in panel a was taken on May 3, , while the picture Titan's Haze is Falling. Sunlight streams through the high-altitude haze layer that extends completely around the giant moon, Titan, in this view of the moon taken by the Cassini spacecraft.
Some fine structure can be spot Amazing Hazes. Saturn's moon Helene, seen here with Saturn's nearly edge-on rings, orbits 60 degrees ahead of Dione and is called a "Trojan" moon. Astronauts Alan Shephard and Edgar Mitchell attempted to reach the Cone crater rim and sampled the ejecta blanket at various locations during their traverse. Unfortunately for them, the gently undulating landscape around Cone crater obscured the crater rim from view and they were forced to return from their traverse without photographing the interior of the crater.
However, later analysis of photography from the traverse, paired with orbital images, revealed that they had nearly reached the rim! The astronauts were closer than 30 meters from the crater rim, so their samples probably represent the deepest material excavated by the impact. This experience - and experiment - showed that a radial traverse of crater ejecta was an appropriate method to sample the vertical stratigraphy.
The high-resolution LROC NAC images, coupled with derived DTM topography will ensure that future human lunar explorers make it to the crater rim when making a radial traverse of an ejecta blanket! Take a peek at the full LROC NAC image - can you find reflectance variations within the ejecta blanket that may represent compositional differences from within the crater? Do you see any other bouldery ejecta rays around the rim?
In contrast, lunar ejecta blankets are due mostly to ballistic sedimentation. From: ejecta blanket in A Dictionary of Earth Sciences ». Subjects: Science and technology — Earth Sciences and Geography. View all related items in Oxford Reference ». Search for: 'ejecta blanket' in Oxford Reference ». All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use for details see Privacy Policy and Legal Notice.
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