The Fermi Gamma-ray Space Telescope, a joint mission of NASA, the US Department of Energy, and international partners, today released a three-month sky-map of the gamma-ray sky and a list of the ten ...
If our eyes could see radio waves, the nearby galaxy Centaurus A (Cen A) would be one of the biggest and brightest objects in the sky, nearly 20 times the apparent size of a full moon. What we can't ...