Image credits: NASA except for Viet Chu/Independent Picture Service, p. 1; NASA, ESA, and M. Livio and the Hubble 20th Anniversary Team (STScI), p. 13 (Carina Nebula background throughout); Sovfoto/Universal Images Group/Getty Images, p. 20; MPI/Archive Photos/Getty Images, p. 22; Space Frontiers/Archive Photos/Getty Images, p. 31; Alan Wilson/flickr (CC BY-SA 2.0), p. 35; Steve Jurvetson/flickr (CC BY 2.0), p. 43; Donaldson Collection/Michael Ochs Archives/Getty Images, p. 65; Bill Eppridge/The LIFE Picture Collection/Getty Images, p. 77; ESA/NASA, p. 111; NASA/JPL-Caltech and The Hubble Heritage Team (STScI/AURA), p. 113 (bottom); NASA/JPL-Caltech, p. 117.
Front cover: Hartmuth Kintzel/500px/Getty Images (moon); NASA (lunar module). Back cover: NASA.