NASA's Fermi Gamma-ray Space Telescope has been mapping out the high-energy sky for several years. Here, Fermi scientists list 10 of their favorite gamma ray sources, from supernovas to black ...

10 great telescopes to use in the city or any place with lots of light Don’t let bright lights prevent you from exploring cosmic sights. By Phil Harrington | Published: December 21, 2023 ...

The result: More than one light per person in Germany is still on late at night, and streetlights are in the minority. The research team published their results in the journal Nature Cities on ...