Gravitational lensing occurs when light bends through space due to the gravity of another body. In the first verified case of gravitational lensing (nearly 30 years ago), a mega distant quasar is lensed by an entire galaxy sitting virtually “in line of site” with us. The light from this quasar is bent as it passes the galaxy and is split into two distinct, separate images. Known as the Double Quasar, or Twin Quasar, QSO 0957+561 is located in Ursa Major where it shines near magnitude 17 – More >