Photographic Atlas

The 3-D Atlas of the Stars and Galaxies shows the stars and A star at twice that distance (and showing a parallax of one-half galaxies in three-dimensional space, with the third of a second of arc) is said to be at a distance of'two parsecs'; one dimension- distance- dire. ctly apparent to stereoscopic showing a parallax of one-tenth of a second of arc is said to be VISion. The 3-D maps- stereographs- are accurate at a distance of ten parsecs, and so on (1 pc "",3·26 Iy; 10 pc representations constructed from the most recent data available. ~32·6Iy). Because our eyes are set between two and three inches