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@puniko It's really possible. You just need a parabolic reflector with good aiming. This task is so common in radio engineering that the antenna noise is measured as a temperature. Pointing the antenna to the empty cold sky and you get silence, the lowest noise possible is 2.7 K, temperature of the universe itself. Pointing it at the sun and it's hot, at least 1000 K of noise, most came from blackbody radiation. It's why it's very difficult to receive a signal from a satellite when it moves close to the sun in the sky.