Page 636 - 89 history of astronomy_opt

˜
nebulA could be resolved by large telescopes
into stars. He considered that the Milky
Way is a great star cluster, whose form may
be conjectured from numerous star-gaugings.
He supposed that the compact ”planetary
˜
nebulA” might show a stage of evolution
˜
from the diffuse nebulA, and that his classi-
fications actually indicate various stages of
development. Such speculations, like those
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