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Space Exploration

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    $\begingroup$ geoffc : If you want to count CSM as a stage, please add LM. $\endgroup$ Commented Aug 7, 2013 at 19:29
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    $\begingroup$ @DeerHunter So LM is a great example that breaks the rule. It does not contribute to the initial launch. So by that thinking, the SM does not either. The S-IV stage did the TLI. And SM does TEI on the way back. $\endgroup$ Commented Aug 7, 2013 at 19:34
  • $\begingroup$ The Soviet N1 Rocket (intended for a moonshot) was a 5 stage design too. en.wikipedia.org/wiki/N1_%28rocket%29 $\endgroup$ Commented Aug 7, 2013 at 20:08
  • $\begingroup$ I think you need to define more clearly what counts as a stage, but the list of possible candidates shouldn't neglect to include Titan IV with up to 5 stages, and Proton with 3-4, but up to 6 RD-253 boosters attached to stage 1. ;) $\endgroup$ Commented Aug 7, 2013 at 20:39
  • $\begingroup$ @TildalWave I agree, stage definition is hard, I am thinking leave up to the answer to define it. Atlas that dropped tanks along the way 1 stage? 1.5? $\endgroup$ Commented Aug 7, 2013 at 21:20