Apollo 12 changes the moons surface check the photo
Tuesday, 9 July 2013
Two-and-a-half years later, on Nov. 19, 1969, Apollo 12 demonstrated the lunar module's capability to make a pinpoint landing by setting down on the edge of Surveyor Crater, about 170 yards (155 meters) from the deactivated Surveyor 3 spacecraft. Almost 45 years later, LROC (short for the LRO Camera) imaged the same area of Oceanus Procellarum that Lunar Orbiter 3 photographed. The LROC image, however, reveals some new features: The Apollo 12 lunar module (Intrepid), Surveyor 3, and astronaut tracks are all visible. Perhaps most evident is that Surveyor crater and the area around the lunar module are noticeably brighter than in the Lunar Orbiter 3 image.
This increase in reflectivity resulted from effects of rocket exhaust blasting the lunar surface during Intrepid's descent. Directly beneath and adjacent to Intrepid, the surface appears darker because the exhaust gas disrupted and roughed up the surface. However, a few yards away from the lander and extending outward for several hundred yards, the surface was altered in such a way as to make it more reflective. The Apollo 12 descent experienced greater thrust and therefore greater soil erosion rates than Apollo 11. During the Apollo 12 descent, astronaut Pete Conrad flew Intrepid around the edge of Surveyor crater in order to get to the safe landing spot he wanted. The crater then likely acted as a mechanism to contain the rocket exhaust, causing the entire crater to experience disturbance and appear more reflective.
Posted by nailis at 21:25