This article details a DIY hydrogen-line radio telescope built from affordable materials like foam insulation board, a paint thinner can, an SDR (AirSpy), and amplifiers. It explains how to detect the 1420.4-MHz signal emitted by hydrogen to image the galaxy and measure galactic rotation.
Pomelo is a complete low-power gamma ray spectrometer designed for independent use or integration into other projects. The repository includes hardware versions Pomelo Core and Pomelo Zest, with details available on Hackaday.io. It is licensed under MIT, featuring a variety of files primarily coded in C.
