Quasar 8C 0958+561

Quasar 8C 0958+561

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. The quasar 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. The Twin Quasar gives direct observational evidence for Einstein's theory of general relativity. The time delay in the light arrival from the two images has also been used as an independent measurement of the Hubble constant which relates a galaxy's distance to its recession velocity because of the expansion of

Album / Science Source / Gerard Lodriguss

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3825 x 2550 px | 27.9 MB

32.4 x 21.6 cm | 12.7 x 8.5 in (300 dpi)