Hubble photographed the green space arc

The Hubble telescope team has published an image of a distant galactic cluster. We see it as it was 7.5 billion years - long before the formation of our solar system. At the bottom of the image you can see the brightest galaxy clusters. She is known under the designation SDSS J1156 + 1911.
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According to astronomers, the mass of SDSS J1156 + 1911 is about 600 billion solar. This is slightly less than the mass of the Milky Way. Nevertheless, it is enough for the gravity of the galaxy to distort and amplify the light from another galaxy, located behind it and distant from us to an even greater distance. This is called gravitational lensing.
The effect of a gravitational lens is capable of creating various fancy cosmic mirages. Sometimes, because of it, the image of a more distant object can be duplicated many times (the so-called “Einstein's cross”). At times, due to gravitational distortions, astronomers observe ring-shaped light structures (“Einstein rings).
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Einstein's Cross
Hubble photographed a green space arc of J11561911, Einstein, galaxy, image, see, more, billions, Sometimes, clusters, Hubble, distant, multiple, astronomers, distortions, gravitational, Einstein, cross, duplicated, different

Einstein Ring
But in this case, the apparent location of the two galaxies is not exactly the same. Therefore, in the Hubble picture, just below SDSS J1156 + 1911, we see a kind of arch painted in green. This is the image of a more distant galaxy, distorted and enhanced by gravity SDSS J1156 + 1911.

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