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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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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.