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24 April 2014 11:45 am ,
Vol. 344 ,
Major climate data sets have underestimated the rate of global warming in the last 15 years owing largely to poor data...
The tsetse fly is best known as the vector for the trypanosome parasites that cause sleeping sickness and a disease in...
The National Institutes of Health is revising its "two strikes" rule, which allowed researchers only one chance to...
By stabilizing the components of retromers, molecular complexes that act like recycling bins in cells, a recently...
Fossil fuels power modern society by generating heat, but much of that heat is wasted. Semiconductor devices called...
Researchers are gaining insights into what made Supertyphoon Haiyan so powerful and devastating through post-storm...
Millions around the world got a first-hand look at what it was like to be in Tacloban while it was pummeled by...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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NASA Changes Moon Target
29 September 2009 4:01 pm
Just days after expressing “great confidence” that they had found the best possible target for next week’s planned crash into the moon, the Lunar Crater Observation and Sensing Satellite (LCROSS) mission team has retreated from its first choice. Yesterday, NASA quietly posted the targeting switch from crater Cabeus A to nearby Cabeus proper.
The goal of crashing LCROSS’s spent upper stage is to kick up any subsurface water ice into the view of the trailing LCROSS spacecraft. (The mission is only distantly connected to last week's much ballyhooed finding of molecular water on the lunar surface.) But continuing analysis of remote sensing from NASA’s Lunar Reconnaissance Orbiter was pointing to stronger signs of subsurface hydrogen—presumably in the form of water—in the permanent shadow inside Cabeus than in similarly cold shadow in Cabeus A, according to the NASA statement. At the same time, topographical observations from the orbiter and the Japanese orbiter Kaguya were showing that ground-based astronomers could after all glimpse impact ejecta through a gap in the high rim of Cabeus. Impact still will be as planned at 7:30 a.m. EDT on 9 October.