HE0435-1223, a lensed quasar, is surrounded by four images created by a foreground galaxy, making it one of the five best lensed quasars discovered. Hubble's image of NGC 5793, a spiral galaxy 150 ...
A NASA study has revealed a peculiar black hole. It rotates sideways, defying expectations in its galaxy, NGC 5084. The sideways black hole, discovered using archived Chandra X-ray data, surprised ...