universetoday.com
GAIA is "Go" for Science After a few Minor Hiccups - Universe Today
In astronomy we throw around the term “light-year” seemingly as fast as light itself travels. And yet actually measuring this distance is incredibly tricky. A star’s parallax — its tiny apparent shift once a year caused by our moving viewpoint on Earth — tells its distance more truly than any other method. Accurate parallaxes of … Continue reading "GAIA is “Go” for Science After a few Minor Hiccups"