Hallow means to make or declare holy.
lincoln observes that the soldiers of gettysburg
died so that
slavery would be abolished.
the nation would survive.
the battleground would be made holy.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.