A mosaic of the cosmos made with Euclid Space Telescope data. Image: ESA/Euclid/Euclid Consortium/NASA, CEA Paris-Saclay, image processing by J.-C. Cuillandre, E. Bertin, G. Anselmi (CC BY-SA 3.0 ...
"This is just 1% of the map, and yet it is full of a variety of ... and near-infrared light using a spectrometer. This enables us to measure "redshift," the changes in which wavelengths of light ...