bn:00043897n
Noun Concept
Categories: 1663 in science, Telescope types, Optical telescopes, 17th-century inventions, 1663 introductions
EN
Herschelian telescope  off-axis reflector
EN
A reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed WordNet 3.0
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EN
A reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed WordNet 3.0 & Open English WordNet
WordNet 3.0 & Open English WordNet
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