Hubble watches cosmic light bend

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Credit: ESA/Hubble & NASA, D. Coe

This extraordinary picture from the NASA/ESA Hubble Space Telescope of the galaxy cluster Abell 2813 (also referred to as ACO 2813) has an virtually delicate magnificence, which additionally illustrates the outstanding physics at work inside it. The picture spectacularly demonstrates the idea of gravitational lensing.

Among the tiny dots, spirals, and ovals which might be the galaxies belonging to the cluster, there are a number of distinct crescent shapes. These curved arcs of light aren’t curved galaxies. They are robust examples of a phenomenon often called gravitational lensing.

Gravitational lensing happens when an object’s mass causes light to bend. The curved crescents and “S” shapes are light from galaxies that lie past Abell 2813. The galaxy cluster has a lot mass that it acts as a gravitational lens, bending light from extra distant galaxies round it. These distortions can seem as many various shapes, akin to lengthy traces or arcs.

This visible proof, that mass causes light to bend, is famously used as proof of Einstein’s idea of normal relativity.

The picture is a compilation of observations taken with the Hubble Space Telescope’s Advanced Camera for Surveys and Wide Field Camera 3. 


Image: Hubble sees a ‘molten ring’


Provided by
NASA’s Goddard Space Flight Center


Citation:
Hubble watches cosmic light bend (2021, April 18)
retrieved 18 April 2021
from https://phys.org/news/2021-04-hubble-cosmic.html

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