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Proper motion - History | | Proper motion - History: Encyclopedia II - Proper motion - History | | Proper motion was discovered in 1718 by Edmund Halley, who noticed that Sirius, Arcturus and Aldebaran were over half a degree away from the positions charted by the ancient Greek astronomer Hipparchus roughly 1850 years earlier.
In research published in 2005, the first measurement of the proper motion of a galaxy (the Triangulum Galaxy) was made. [1]
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See also:Proper motion, Proper motion - Introduction, Proper motion - History, Proper motion - Stars with high proper motion | | | Proper motion, Proper motion - History, Proper motion - Introduction, Proper motion - Stars with high proper motion, Aberration of light, Double star, Epoch (astronomy), Henderson, Thomas, Kapteyn, Jacobus, List of astronomical topics, Parallax, Star catalogue, Superluminal motion, Timeline of stellar astronomy | | |
| | | Proper motion: Encyclopedia II - Proper motion - History
Proper motion - History
Proper motion was discovered in 1718 by Edmund Halley, who noticed that Sirius, Arcturus and Aldebaran were over half a degree away from the positions charted by the ancient Greek astronomer Hipparchus roughly 1850 years earlier.
In research published in 2005, the first measurement of the proper motion of a galaxy (the Triangulum Galaxy) was made. [1]
Other related archives1718, 2005, 61 Cygni, Aberration of light, Aldebaran, Alpha Centauri, Arcturus, Barnard's star, Double star, Edmund Halley, Epoch (astronomy), Epsilon Indi, Groombridge 1830, Henderson, Thomas, Hipparchus, Hipparcos, Kapteyn's star, Kapteyn, Jacobus, Lacaille 9352, Lalande 21185, List of astronomical topics, Parallax, Sirius, Star catalogue, Sun, Superluminal motion, Teegarden's star, Timeline of stellar astronomy, Triangulum Galaxy, Ursa Major, Wolf 424, apparent magnitude, constellations, improper motions, light years, motion, nearest, radial velocity, red dwarf, seconds of arc, solar system, star, telescope
 Adapted from the Wikipedia article "History", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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