Gaia Milky Way stars

Data release 3 from ESA’s Gaia mission includes a total of 1.8 billion (thousand million) Milky Way stars – providing astronomers with an unprecedented view of stellar characteristics and their life cycle, and the galaxy's structure and evolution.

This infographic shows the various subsets of data that are provided for the stars:

• 813 thousand binary star systems
• 1.5 billion object classifications
• 10 million variable stars
• 33 million radial velocities
• Low-resolution spectroscopy
  • 470 million astrophysical parameters
  • 220 million spectra
• High-resolution spectroscopy
  • 5.6 million astrophysical parameters
  • 2.5 million chemical compositions
  • 1 million spectra
• Astrometry and photometry for 1.5 billion stars (already released in early data release 3)
  • Brightness, colour, position, distance, proper motions