18
What are dark matter and dark energy? The large-scale structure of the cosmos encodes them both, with ESA’s Euclid mission leading the way.
Measuring our Universe is challenging from within the Milky Way.
Optical measurements pinpoint stars, while longer wavelengths reveal dust.
From space, ESA’s Euclid mission has grander aims.
Over six years, total, it will map out huge areas of the entire sky.
These maps aren’t merely large-area, but also deep and high-resolution.