Panning across Irregular Galaxy NGC 6822 in Sagittarius | Euclid Space Telescope FriendsofNASA.org: To create a 3D map of the Universe, the European Space Agency's Euclid space telescope will observe the light from galaxies out to 10 billion light-years. Most galaxies in the early Universe do not look like the quintessential neat spiral, but are irregular and small. They are the building blocks for bigger galaxies like our own, and we can still find some of these galaxies relatively close to us.