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Fumesucker

(45,851 posts)
4. ALMA is not an optical telescope, it's millimeter and submillimeter radio
Wed Nov 11, 2015, 03:00 AM
Nov 2015

The reason it has to be at high altitude is because those frequencies are absorbed by the water vapor in our atmosphere, it's in the Atacama desert because that's driest place on the planet.

Latest Discussions»Culture Forums»Science»Giant Radio Telescope Pee...»Reply #4