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  4. Edwin Powell Hubble
  5. Not until the empirical resources are exhausted, need we...

Not until the empirical resources are exhausted, need we pass on to the dreamy realms of speculation.

Edwin Powell Hubble
Needs, Exhausted, Resources
Edwin Powell Hubble (1936). “The Realm of the Nebulæ”
Not until the empirical resources are exhausted, need we pass on to the dreamy realms of speculation.