Astrometry is the oldest branch of astronomy, dedicated to measuring the precise positions, distances, and motions of celestial objects. From Hipparchus's ancient star catalog to ESA's Gaia mission mapping over a billion stars, astrometric techniques have anchored our understanding of the cosmic distance ladder and the structure of the Milky Way.
These simulations let you measure stellar parallax to determine distances, track proper motion across the sky, solve binary star orbits, calibrate astrometric instruments, and build celestial reference frames — all using the same mathematical principles employed by modern space observatories.