How The 'Dark Universe' Telescope Euclid Scans The Sky

Euclid uses a method called 'step-and-stare to scan the night sky, which allows it to combine a bunch of separate measurements to form a larger image. Ultimately, scientists believe this will yield the largest cosmological survey ever conducted in visible and near-infrared light.

Credit: ESA. Acknowledgement: Work performed by ATG under contract for ESA.