Smithsonian Report, 1949.—Hubble 
EXTRAGALACTIC NEBULAE 
These nebulae are examples of the stellar systems which serve as landmarks in 
the exploration of the universe. The group above (NGC 3185, 3187, 3190, 
3193) is at a distance of about 8 million light-years and appears to be receding 
from us at the rate of about 850 miles per second. 
