Which ESA observatory provided precise observational data supporting the galactic merger hypothesis regarding the Sgr Dwarf?

Answer

ESA’s Gaia observatory

The credibility of the hypothesis linking Solar System formation to the gravitational influence of the Sagittarius Dwarf Galaxy is significantly bolstered by precise observational data gathered from specific space missions. Among these, the European Space Agency's (ESA) Gaia observatory is specifically credited with providing the accurate, detailed measurements required. Astronomers utilized data from Gaia to meticulously map the orbits and velocity dispersions of stars within the Milky Way, allowing them to identify patterns that correlate precisely with the calculated timing and signature of the gravitational impacts caused by the Sgr Dwarf's known passages through the galactic plane.

Which ESA observatory provided precise observational data supporting the galactic merger hypothesis regarding the Sgr Dwarf?

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