Open AccessWilliam Herschel's observed Nebulous Regions, 52 in number, compared with Isaac Roberts' Photographs of the same Regions, taken simultaneously with the 20-inch reflector and the 5-inch Cooke lens
Author(s) -
Isaac Roberts
Publication year - 1902
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-8711
pISSN - 0035-8711
DOI - 10.1093/mnras/63.1.26
Subject(s) - physics , reflector (photography) , optics , lens (geology) , astrophysics , light source
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