What instrument did Edwin Hubble utilize at Mount Wilson Observatory to resolve stars in the Andromeda Nebula?
Answer
The 100-inch Hooker Telescope
To measure distances across intergalactic space, a telescope with immense light-gathering power was necessary, as simple parallax measurements were impossible due to the tiny angles involved. Edwin Hubble relied on the 100-inch Hooker Telescope, which was the largest and most powerful instrument available at that specific time. This telescope was situated at the Mount Wilson Observatory in California, and its superior capability was crucial for resolving individual stars within the faint, fuzzy structure of the Andromeda Nebula, thus enabling the subsequent discovery.

Related Questions
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