Smithsonian Report, 1930. — Page 



PLATE 3 



Messier .il m the constellation Andromeda, an extragalactic nebula far beyond 

 the confines of the Milky Way system. Because other similar nebulae are 

 seen at all angles of tilt (from circular form, as on plate 4, to lenticular forms 

 seen edge-on). Messier 31 is interpreted as a circular disk, tilted with one edge 

 toward us. The two smaller bright fuzzv patches are other extragalactic 

 nebulae (of elliptical type) at about the same distaiic(> as Messier 31. (Photo- 

 graph Yerkes Observatory.) 



