proper motion
proper motion The apparent movement of a star relative to the other ‘fixed’ stars, at right angles to the observer's line of sight. For example, Barnard's star moves 10 seconds of arc per year; this is the largest proper motion recorded. There is no absolute frame of reference, and the positions of stars in the familiar constellations change significantly within a few thousand years.
More From encyclopedia.com
Friedrich Wilhelm August Argelander , Argelander, Friedrich Wilhelm August
Argelander, Friedrich Wilhelm August
astronomy.
Argelander’s father, Johann Gottlieb Argelander, was a wealthy m… Friedrich Wilhelm Bessel , Bessel, Friedrich Wilhelm
Bessel, Friedrich Wilhelm
astronomy, geodesy, mathematics.
Bessel’s father was a civil servant in Minden; his mother was th… Star Anise , Star anise Ejnar Hertzsprung , Hertzsprung, Ejnar
Hertzsprung, Ejnar
astronomy.
Hertzprung’s father, Severin Hertzsprung, had a graduate degree in astronomy from the University of… Jacobus Cornelius Kapteyn , Kapteyn, Jacobus Cornelius
astronomy.
Kapteyn was the ninth of fifteen children of G. J. Kapteyn and E. C. Koomans, who conducted a boarding school f… Binary Star , Binary stars, often called double stars, refer to pairs of stars sufficiently close to each other in space to be gravitationally bound together. Foll…
About this article
proper motion
All Sources -
You Might Also Like
NEARBY TERMS
proper motion