Euclid scans the sky

Euclid will scan across the night sky, combining separate measurements to form the largest cosmological survey ever conducted in the visible and near-infrared. This animation shows the areas it will cover. The different shades of grey depict the area of the sky covered over one year during Euclid’s six-year survey.

Euclid will scan over 35% of the sky, focussing on the extragalactic sources. This is the largest area it can cover while avoiding the overpowering brightness of the Milky Way galaxy (horizontal bright line), its largest satellite galaxy (bright spot bottom right) and the dust and sources in the plane of our own Solar System (diagonal bright line).