Sentence examples for proper motion from inspiring English sources
noun
The change in apparent position of a celestial body due to that body's velocity relative to the Sun.
Barnard's star has the largest proper motion of any known star 10.25 seconds of arc annually.
The symbol for proper motion is the Greek letter μ (mu).
Motions, including radial velocities and proper motion, have been measured for thousands of cluster stars.
Previously, a guide star with a large proper motion is excluded in calculating the aspect solution.
Whenever bodies are moving with their proper motion, the larger moves quicker.
This motion is called proper motion (as mentioned above) and would also cause a change.
A more typical proper motion is about 0.1 arcseconds a year.
This is not the same as a proper motion of no confidence in the government and, unlike a proper motion of no confidence, the government does not have to allow time for it to be debated.
Reid, M. J., Readhead, A. C. S., Vermeulen, R. C. & Treuhaft, R. N. The proper motion of Sagittarius A*.
Backer, D. C. & Sramek, R. A. Proper motion of the compact, nonthermal radio source in the galactic center, Sagittarius A*.
The latter value is that of Barnard's star, which is the star with the largest known proper motion.
