... nebulae consist of clusters of stars. The galaxies in the Virgo cluster are, of course,themselves very distant clusters of stars, and the globular clustersconsist of stars, but some of the nebulae ... of them averages of ten separatefields.Next, Herschel calculated the depth of the heavens in the direction of his gauge—or more correctly, the relative depth, for the absolute distances to the ... through the poles of the MilkyWay (i.e., at 908 from the plane of the bright zone) and inter-secting the Milky Way at the point where it appears to branchor divide in two. The resulting plan of the...