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Listen to the Sun, Saturn, and the Milky Way with Your Own Radio Telescope

Students from the Indian Institute of Science Education and Research combined a commercial satellite dish, a satellite finder and an Arduino, and produced a workable radio telescope. The satellite dish provides the LNB (low noise block) and the associated set-top box is used only for power.  Their LNB employs an aluminum foil shield to block extraneous signals. In addition to the hardware, the team built Python software to analyze the data and show several practical applications.
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