Which event is directly before Apollo 11 in the spaceflight milestones timeline?

Answer options

• Correct: Vostok 1
  "Vostok 1" - target Vostok 1 follows Sputnik 1 in the spaceflight timeline and sits. Vostok 1 is linked to the event year 1961. The task targets this mapping, and Vostok 1 remains correct in this prompt.
• Option: Sputnik 1
  "Sputnik 1" vs. "Vostok 1" Sputnik 1 sits before Vostok 1 in the; misses the target mapping. Sputnik 1 is linked to the event year 1957. The task targets this mapping, so Sputnik 1 remains wrong in this prompt.
• Option: ISS assembly
  "ISS assembly" vs. "Vostok 1" ISS assembly follows Apollo 11 in the; misses the target mapping. ISS assembly is linked to the event year 1998. The task targets this mapping, so ISS assembly remains wrong in this prompt.
• Option: Apollo 11
  "Apollo 11" vs. "Vostok 1" Apollo 11 follows Vostok 1 directly in; misses the target mapping. Apollo 11 is linked to the event year 1969. The task targets this mapping, so Apollo 11 remains wrong in this prompt.

Solution

Vostok 1

Vostok 1 is correct: in spaceflight milestones, Apollo 11 is at position 3; the direct previous neighbor is position 2. The prompt targets Vostok 1, so the graph keeps this mapping stable against close alternatives. Source: Wikidata. As of: 2026-02-13.

Fun fact

Neighbor events are accepted only inside the same timeline scope; same-date events are blocked without a stable sort key. Vostok 1 carries the additional dataset detail 1961. The graph therefore uses a multi-hop graph path;