US EditionA dramatic Einstein ring seen by Webb
- The James Webb Space Telescope captured an image of a rare cosmic phenomenon called an Einstein ring.
- Massive objects bend light due to their gravitational influence, a concept central to Einstein's theory.
- This Einstein ring forms when a distant galaxy's light is gravitationally lensed around a closer foreground galaxy.
- ESA explained, "What at first appears to be a single, strangely shaped galaxy is actually two galaxies separated by a large distance."
- The magnified and brighter light from the lensed galaxy provides a unique opportunity to study distant galaxies.
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A dramatic Einstein ring seen by Webb
One of the first verified predictions of general relativity is the gravitational deflection of starlight. The effect was first observed in 1919 during a total solar eclipse. Since stars appear as points of light, the effect is seen as an apparent shift in the position of stars near the eclipse. But the effect happens more generally.
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