Quote:
Originally posted by John L@Nov 30 2004, 08:25 PM
Didn't Hipparcos produce distance measurements that were about ten percent off?
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Hipparchos measured parallax, but picked up star variability at the same time.
The amount that the Hipparchos measurements were off depended on how far the star was. It was about 10% off to the Pleides, but much less than 1% to Alpha Centauri.