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Gaia stops observing

node

After about twelve years of scanning, the European Space Agency ended Gaia's science observations; following technology tests the spacecraft was passivated and moved out of its orbit around the Sun-Earth L2 point on 27 March 2025. The astrometry it collected underpins the modern empirical Hertzsprung-Russell diagram, because a luminosity is only as good as the distance behind it.

A node is not a place. Drawing it on a map would assert something about the world that no stored fact supports.

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Evidence · 1
Timeline

No dated observations are stored for this object. Atlas shows what was observed and when — it does not infer a history.

Connections · 2
Assembled narrative · 1

Assembled from 21 blocks · 1 evidence · 13 related

  1. Story
  2. After about twelve years of scanning, the European Space Agency ended Gaia's science observations; following technology tests the spacecraft was passivated and moved out of its orbit around the Sun-Earth L2 point on 27 March 2025. The astrometry it collected underpins the modern empirical Hertzsprung-Russell diagram, because a luminosity is only as good as the distance behind it.
  3. Knowledge
  4. Hertzsprung-Russell diagram
  5. Gaia (ESA astrometric survey)
  6. Gaia stops observing
  7. Connections
  8. Gaia (ESA astrometric survey)
  9. Hertzsprung-Russell diagram
  10. Hertzsprung-Russell diagram
  11. Gaia stops observing
  12. Gaia Data Release 4 scheduled
  13. Ejnar Hertzsprung
  14. Henry Norris Russell
  15. Main sequence (core hydrogen burning)
  16. Gaia (ESA astrometric survey)
  17. Hertzsprung and Russell independently plot luminosity against temperature
  18. Gaia stops observing
  19. Gaia Data Release 4 scheduled
  20. Evidence
  21. Supports the 15 January 2025 end of science observations, the 27 March 2025 passivation, the December 2026 planned date for Data Release 4 and the description of DR4 as covering all data types for the full nominal mission. The pages were not fetched because the domain was blocked; content comes from search summaries of those ESA pages.
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Observed changes · 0

No public Signals are attached to this object. Signals show what changed and when it was observed — never a direction or a rank.

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/atlas?object=EVT_GAIA_OBSERVATIONS_END_2025&experience=EVT_GAIA_OBSERVATIONS_END_2025