June 5, 2023

Parts of the electromagnetic spectrum invisible to human eyes reveal a vast amount of information about the universe, but it took a long time for astronomers to learn how to view it.

For thousands of years, humans were looking up at the star-studded night sky using just their eyes sensitive to the optical wavelength of the electromagnetic spectrum. The first telescopes, invented in the early 17th century, enhanced the ability of human eyes by magnifying distant objects. 

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