Technique · Astrometry & Motion
Space Astrometry
Measuring stellar positions, distances, and motions from space at extraordinary precision. ESA's Hipparcos and then Gaia have charted more than a billion stars, transforming our three-dimensional map of the galaxy.
Astrometry & MotionMeasures: Precise positions of a billion stars
Highlights
- ›Gaia has mapped over a billion stars in 3-D
Builds on
Knowledge connections
- Member of groupAstrometry & Motion
- Associated withGaia
- Associated withThe International Celestial Reference Frame (ICRF3)
- Associated withPlate Solving
Sources
The primary and reference sources this topic draws on.
- ESAEuropean Space Agency
European missions, observatories, and space science imagery.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.