Seeing and Believing: How the Telescope Opened Our Eyes and Minds to the Heavens

Journalist Richard Panek begins his historical essay on the telescope with the Hubble Deep Field. This extended exposure by space telescope is a picture that looks out of our galaxy--farther, immeasurably farther, than the human eye has seen before. It exemplifies the purpose of all telescopes: "To address our place in the universe, literally. To size up all of space and figure out where we are in it." How and why did this particular technology have such profound effects?

Panek first considers Galileo, who "raised his new instrument toward the night sky and understood at once that there was more to see--and more to seeing--than meets the eye.... Unlike spectacles or magnifying lenses, the optic tube offered not just a distortion of what was already there, but more. It revealed evidence that was different from what the naked eye could see, evidence that wasn't otherwise there." Panek goes on to look at the, ahem, luminaries of observational astronomy--William Herschel, George Ellery Hale, Edwin Hubble--showing how faith in the telescope grew and our mental image of the universe expanded until "all the assumptions safely based on observation are gone." Panek's prose is vivid and beautiful, sustaining this (curiously) unillustrated book as it traces the astronomer's quest for light and dark, sight and belief. --Mary Ellen Curtin