# Euclid

*Spacecraft*

Surveying a third of the sky to build a three-dimensional map of how galaxies are distributed and how that distribution has changed over ten billion years. The shape of it is the evidence: dark matter and dark energy make up 95% of the universe and are known only by what they do to everything else.

| | |
| --- | --- |
| Agency | ESA |
| Launched | 2023-07-01 - still working |
| From the Sun | 152,087,912 km (-43,486 km/d) |
| From the Earth | 1,444,324 km (-11,054 km/d) |
| A signal takes | 5 s |
| Travelling at | 29.9 km/s |

Distances and speed are computed from JPL Horizons trajectories and are true of 2026-09-05, changing at the rate given beside each. The interpolation itself is good to a few kilometres; what ages these figures is the date, not the arithmetic.

## Path

The same kind of loop about L2 that JWST is on, which is why the two are drawn near each other here: it is a region a few hundred thousand km across, and both are in it.

## Along the way

- 2023-11-07 — First full-colour pictures of the dark universe survey

## Elsewhere

- On the live map: https://www.orbitalmap.space/?world=solar-system&focus=euclid
- The mission's own page: https://www.esa.int/Science_Exploration/Space_Science/Euclid
- This object as a page: https://www.orbitalmap.space/o/euclid/
- Every object: https://www.orbitalmap.space/o/
- What this site is and what it reads: https://www.orbitalmap.space/llms.txt