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1 gen 1890 anni - Reflectors were recognized

Descrizione:

40 inches was close to the maximum feasible aperture for refracting telescopes. If telescopes with significantly larger apertures were to be built, they would have to be reflecting telescopes.

Aggiunto al nastro di tempo:

Technology timeline of astronomy

ByHunter
13 feb 2020
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204

Data:

1 gen 1890 anni
Adesso
~ 135 years ago
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