Page 644 - 89 history of astronomy_opt
P. 644
distribution of nebular matter in the con-
ˆ
ˆ
stellation Scorpio over a space of 4A or 5A
square. Barnard asserts that the ”nebular
hypothesis” would have been killed at its
birth by a knowledge of these photographs.
Later he has used still more powerful in-
struments, and extended his discoveries.
The association of stars with planetary
˜
˜
nebulA, and the distribution of nebulA in
644
