Can we map the 95% of the universe that remains completely invisible to us?

The European Space Agency's Euclid mission aims to solve the mystery of dark matter and energy. This video offers a behind-the-scenes look at the human effort and engineering precision required to build a telescope capable of mapping billions of galaxies across 10 billion light-years.

While we have gained significant understanding of how stars and galaxies evolve over the last 70 years, the vast majority of the universe remains a mystery. Approximately 95% of the cosmos consists of dark matter and dark energy, which exert influence on visible matter but do not interact with light. Because these entities neither emit, reflect, nor absorb radiation, their true nature remains unknown.

Euclid is designed to map the large-scale structure of the universe to investigate these dark components. The mission involves observing billions of galaxies stretching back 10 billion light-years. The video documents the assembly and testing of the spacecraft, highlighting the intricate engineering and the collaborative human effort required to prepare this telescope for its journey into space.

Source: Euclid: Gate to the dark