8C 0958+561 is a quasar that is gravitationally lensed by a closer galaxy forming twin images of the original quasar. The quasar is also designated as Q0957+561 and the two components are designated as QSO 0957+561 A and QSO 0957+561 B. Component A is the northernmost one to the right in this image. The great mass of the intervening galaxy, and the galaxy cluster that in which it is located, lenses the quasar and warps Einsteinian space-time, causing two images of the quasar to appear to be angularly separated by 6 arcseconds. Quasar 8C 0958+561 lies at a distance of 8.7 billion light-years. The lensing galaxy, YGKOW G1, lies at a distance of 3.7 billion light years. Each individual image of the quasar has an apparent magnitude of 16.95V, and a combined brightness of magnitude 16.20V. There is a 417-day time lag in the arrival of the light from the two images because of the different distances that the light has to travel from the source.