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The competition for giant Arecibo-like telescopes is arrays, and since their cross section goes to zero as you turn them towards the horizon (straight up and th
by whatshisface 3y ago
The competition for giant Arecibo-like telescopes is arrays, and since their cross section goes to zero as you turn them towards the horizon (straight up and they're spaced out, from the horizon they're in a line), they are limited within some reasonable range of the zenith as well.