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How does Gaia determine the distance of a star?
by hibbelig 10y ago
How does Gaia determine the distance of a star?
- the8472 10y agoIt can measure a) parallax - triangulation via the spacecraft's orbit around the sun b) proper motion - via multiple observations over the years c) radial velocity - via redshift a gives us distance, b + c gives us the trajectory through the galaxy.