Download or read book On the Shoulders of Titans written by Barton C. Hacker and published by Createspace Independent Pub. This book was released on 2013-10-25 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed, yet highly readable book, On the Shoulders of Titans should be the starting point for all who are interested in the basic history of the Gemini Program. NASA's second human spaceflight program, Gemini laid the groundwork for the more ambitious Apollo program which put astronauts on the Moon.