"In the progressive growth of astronomy, physics or mechanical science was developed, and when this had been, to a certain degree, successfully cultivated, it gave birth to the science of chemistry."

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At the age of three I began to look around my grandfather's library. My first knowledge of astronomy came from reading and looking at pictures at that time. By the time I was six I remember him buying books for me. ... I think I was eight, he bought me a three-inch telescope on a brass mounting. ... So, as far back as I can remember, I had an early interest in science in general, astronomy in particular.

— Jesse L. Greenstein