Euclid, built by more than 2,000 scientists from 300 international institutes, is sharing the second Lagrange point , about a million miles from Earth, with the. However, Euclid’s purpose is much different. The fancy new space probe, described by ESA senior adviser Mark McCaughrean as “an anti-JWST,” is focused on a vast swath of the sky rather than tiny sections.
This image is a powerful example of Euclid’s strengths, as it includes gravitational lensing, the phenomenon by which Euclid will help physicists measure the amount and distribution of dark matter in a galaxy cluster.Another cutout view shows “intracluster light,” the light emitted by stars that have been ripped away from their parent galaxies. Using enhanced white-gray coloring, this type of light also hints at how dark matter is organized.
“Euclid’s instruments can detect objects just a few times the mass of Jupiter, and its infrared ‘eyes’ reveal over 300,000 new objects in this field of view alone. Scientists are using this dataset to study the amount and ratio of stars and smaller objects found here — key to understanding the dynamics of how star populations form and change over time,” ESA explains.
This image also shows Euclid’s impressive handling of bright light sources. A bright foreground star within the Milky Way Galaxy is in the bottom portion of the frame, just left of the center. When viewed through a telescope, a star like this scatters light into a circular halo. However, Euclid was designed to minimize this scattering, ensuring that the star causes little disruption to the overall image. This allows scientists to see faint galaxies relatively “near” the star .
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