DIY Home Radio Telescope for Milky Way Hydrogen Detection

A recent paper by Jack Phelps on arXiv details how to build a home radio telescope using a 1-meter satellite dish and a Raspberry Pi to detect the 21-cm hydrogen emission line at 1420.405 MHz. This line, emitted by neutral hydrogen, is crucial for mapping the Milky Way and understanding galactic structures. The project highlights the accessibility of radio astronomy, allowing enthusiasts to explore celestial phenomena like the sun and Jupiter from their backyard.