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Einstein's Cross, a quasar in the Pegasus constellation, is an excellent example of gravitational lensing. The quasar is about 8 billion light-years from Earth, and sits behind a galaxy that is 400 million light-years away. Four images of the quasar appear around the galaxy because the intense gravity of the galaxy bends the light coming from the quasar.

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known as UZC J224030.2+032131 — has not one but five different nuclei. In fact, the core of the galaxy is only the faint and diffuse object seen at the centre of the cross-like structure formed by the other four dots, which are images of a distant q...See More

da NASA

Hubble Discovers Four Images of Same Supernova Split by Cosmic Lens

Astronomers using NASA’s Hubble Space Telescope have spotted for the first time a distant supernova split into four images.

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The Cartwheel Galaxy, the result of two galaxies that collided about 700 million years ago. The outside ring is comprised of hot blue stars, formed from waves of density moving outwards following the collision. It's a bit larger than the Milky Way, and is located very far away in the constellation Sculptor. It's about 500 million light years distant, or nearly 3 sextillion miles. different shot.

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da Mashable

Galaxy merger caught by Hubble telescope

NGC 7714 is a spiral galaxy 100 million light-years from Earth.

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The picture shows a famous cosmic mirage known as the Einstein Cross, and is a direct visual confirmation of the theory of general relativity. It is one of the best examples of the phenomenon of gravitational lensing — the bending of light by gravity as predicted by Einstein in the early 20th century. In this case, the galaxy’s powerful gravity acts as a lens that bends and amplifies the light from the quasar behind it, producing four images of the distant object.

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The Tadpole Galaxy (also known as UGC 10214 or Arp 188) is a disrupted barred spiral galaxy located about 420 million light-years away toward the northern constellation Draco. Its most dramatic features are an incredibly long trail of stars and massive, bright blue star clusters, reflecting the essence of our dynamic, restless and violent Universe. - Credit: NASA, Hubble, Mehdi Bozzo-Rey

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Three new streams of stars were discovered ringing the Milky Way. The two closest streams are thought to be star clusters, while the huge arcing stream is thought to be a dwarf galaxy. - Credit: Caltech

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An “Einstein Ring”or gravitational lensing at work: the blue galaxy is behind the yellow galaxy but we can see it because the light from the far galaxy gets wrapped around by the closer galaxy. Photo NASA/Hubble

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