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|WikiProject Astronomy||(Rated Start-class, High-importance)|
relative to Earth or Sun
It is not clear to this naive how the Earth's orbit is accounted for. I assume the radial velocity is relative to the Sun even though the measurements are made from Earth. 184.108.40.206 (talk) 03:15, 22 September 2014 (UTC)220.127.116.11
the animation File:Planet reflex 200.gif isnt the right one to correctly show radial velocity. the right animation would show the shifting spectral lines. -- 18.104.22.168 (talk) 00:56, 27 October 2009 (UTC)
It was written "For the figure on the right, the radial velocity of the moon is 0 because the distance between the moon and Earth does not change". Is that true? --Email4mobile (talk) 10:49, 4 April 2010 (UTC)
I've added the header because some texbooks use radial velocity to refer to angular velocity, and I myself was confused. — Preceding unsigned comment added by Hacky (talk • contribs) 03:32, 5 February 2012 (UTC) Actually, I'm the only one confused here. Never mind about the header. Carry on --hacky (talk) 03:40, 5 February 2012 (UTC)