work on 100" Reflector (1 gen 1906 anni – 1 gen 1917 anni)

Descrizione:

Hale had already approached John D. Hooker, who had made his fortune in hardware and steel pipe, with a proposal to build a 100-inch telescope but the issue was that the usefulness of large reflectors for astronomy had yet to be demonstrated.
(It was with this telescope that Edwin Hubble was able to establish that the spiral nebulae were separate islands of stars—or galaxies—quite removed from our own Milky Way.)

Aggiunto al nastro di tempo:

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