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Start with the full category, then apply the exact boundary: The seven astronauts introduced in April 1959, including Deke Slayton. Full names or listed surnames count, whether or not they flew a Mercury mission. You only need one qualifying answer. A longer name is not automatically rarer.
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Shortest accepted input at 65+ points
CooperGordon Cooper · 70 points · 6 characters
Gordon Cooper belonged to the original Mercury Seven astronaut group announced by NASA in 1959.
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Deke Slayton95 points · Shortest accepted spelling: Slayton
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- Apply the complete question boundary: The seven astronauts introduced in April 1959, including Deke Slayton. Full names or listed surnames count, whether or not they flew a Mercury mission.
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Why these answers qualify
Each entry belongs to the bounded set defined by the prompt. The named source supports the underlying facts; our editorial scoring is a separate layer.
Source: NASA · Mercury Seven astronaut biographies ↗
Reference version: 2026-10-02. See our answer policy for how we handle aliases and omissions.