2025年3月28日
Lunar Dust and Duct Tape
Image Credit: Apollo 17, NASA
Explanation: Why is the Moon so dusty? On Earth, rocks are weathered by wind and water, creating soil and sand. On the Moon, eons of constant micrometeorite bombardment have blasted away at the rocky surface creating a layer of powdery lunar soil or regolith. For the Apollo astronauts and their equipment, the pervasive, fine, gritty dust was definitely a problem. On the lunar surface in December 1972, Apollo 17 astronauts Harrison Schmitt and Eugene Cernan needed to repair one of their rover’s fenders in an effort to keep the rooster tails of dust away from themselves and their gear. This picture reveals the wheel and fender of their dust covered rover along with the ingenious application of spare maps, clamps, and a grey strip of “duct tape”.
Northern Hemisphere Alert: March 29 Partial Solar Eclipse
Tomorrow’s picture: pixels in space
说明: 为何月球有这么多粉尘呢？在地球上，岩石受风及水侵蚀而产生土壤和沙。然而，月面上的粉尘（亦称为腐岩），却是历年来微陨石不停轰击岩质的月表所逐渐累积出来的。但是对阿波罗计划的宇航员与装备，这些无所不在的砂砾状粉尘，会造成相当多的麻烦。1972年的12月，在月面上的阿波罗17号宇航员史密特与色南，就必须修复月面车的挡泥板，以免扬起的鸡尾尘伤到宇航员和器具。在这幅影像里，可见到满是粉尘的月面车轮和挡泥板，以及巧妙运用备份月面地图、夹子和银色布胶所进行的修补。
北半球警报: 3月29日偏食
明日的图片: pixels in space
