NASA Unveils E-books on Hubble, Webb Space Telescopes

NASA has just released two free e-books about the Hubble Space Telescope and its not-yet-launched successor, with interactive features that let readers watch a galaxy collision or manipulate a telescope model between pages, agency officials say.

The Hubble Space Telescope launched in 1990 and has a mission lifetime through at least 2013. The space-based observatory has supplied some of the most dazzling visible-light images of distant cosmic objects, which are featured in "Hubble Space Telescope: Discoveries."

The James Webb Space Telescope, which will be almost three times the size of Hubble, has been designed to work best at infrared wavelengths in order to study the very distant uni…
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