An image from the Hubble Space Telescope shows a galaxycluster named Abell 1351, so unimaginably massive it is bending space-time itself.
It’s hard to comprehend the scale of the universe. It’s difficult to imagine even the size of the entire solar system, let alone our galaxy. And our galaxy is just one among billions in the universe. In fact, galaxies don’t just exist alone, but often interact with each other — and often come together in vast groups called galaxy clusters.
Across the image, you can see streaks of light which are pictures of distant galaxies. Because the mass of the galaxy cluster is so great, it warps space-time enough that light passing through it gets bent and spread out, like a magnifying glass. This is called gravitational lensing, and it allows researchers to see objects such as galaxies that are far further away than we could normally observe.
There’s also an effect called microlensing, which is used to detect exoplanets, in which light from a distant object appears brighter because of the body in front of it .
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