Diagram of gravitational focusing of double quasar
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Diagram of gravitational focusing of double quasar
Diagram illustrating how gravitational focusing makes us perceive two images of the quasar 0957+561. The quasar is at far left, Earth at far right. From Earth we see a double image of the quasar as shown on the green panel. This is because we perceive both the radiation that travels straight from the quasar to Earth & also radiation which has been bent, or focused, by the gravity of an intervening galaxy (orange spot to the left of the green panel). 0957+561, named for its celestial coordinates, was the first " double quasar" discovered (in 1979). It is a confirmation of Einsteins general theory of relativity, which predicted the bending of light by massive objects
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Media ID 6442095
© DAVID PARKER/SCIENCE PHOTO LIBRARY
Cosmology Double Galaxy Lens Proof Quasar Relativity
EDITORS COMMENTS
This print showcases a remarkable phenomenon in the vastness of our universe - the gravitational focusing of a double quasar. The image, presented on a green panel, depicts the celestial coordinates of the quasar 0957+561 at the far left and Earth at the far right. What makes this illustration truly fascinating is how it reveals our perception of two distinct images of the same quasar. The explanation lies in Einstein's general theory of relativity, which predicted that light can be bent by massive objects. In this case, an intervening galaxy (depicted as an orange spot to the left) acts as a lens, causing radiation from 0957+561 to be both directly transmitted and also focused towards Earth due to its immense gravitational pull. Discovered in 1979, this groundbreaking finding confirmed Einstein's predictions and provided tangible evidence for his revolutionary theory. Named after its celestial coordinates, double quasar 0957+561 holds great significance in cosmology and astronomy. As we gaze upon this mesmerizing diagram, we are reminded of humanity's relentless pursuit to unravel the mysteries of our universe. It serves as a testament to human ingenuity and scientific progress while igniting our curiosity about what other wonders lie beyond our reach.
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