Recent content by astronut

I am having fundamental difficulty in feeling the definition of specific intensity of a radiation field... questions: 1) Define a radiation field as precisely as possible. 2) Specific intensity defined at a point should remain the same whichever way we choose for the differential surface...

Mining and manufacturing on the moon: http://aerospacescholars.jsc.nasa.gov/HAS/cirr/em/6/6.cfm we are not faraway from the day before we can inhabit the moon.. He-3 as a fuel.. Iron manufacturing units.. 46% oxygen in the crust Polar ice..