Figure 10-4 RIVUXG The Motion of Barnard’s Star Three photographs taken over a four-year period were combined to show the motion of Barnard’s star, which lies 1.82 pc away in the constellation Ophiuchus. Over this time interval, Barnard’s star moved more than 41 arcsec on the celestial sphere (about 0.69 arcmin, or 0.012°), more than any other star.