Transforming a hostile environment into one able to sustain human life; this includes a source of oxygen, water, plant life, and correct air pressure and temperature.
The distance in degrees along the horizon, westward from the south point of the horizon, to the place where a vertical circle through the star or other object intersects the ...
The deflection of particles or radiation by scattering processes through angles greater than 90 degrees with respect to the original direction of motion.
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