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First or earliest instances of a notable event, implementation, or technological achievement related to spaceflight. Use the record tag instead for questions of the class fastest, smallest etc. as these records can be set and broken while firsts never change (in principle)
26
votes
First use of an incandescent light in an un-crewed spacecraft?
This may be stretching the definition of "incandescent light" quite a bit, but the V-2, which was the first artificial object to cross the Kármán line in June 1944 (and thus technically an uncrewed sp …
10
votes
3
answers
1k
views
What's the first recorded use of a countdown associated with a rocket launch?
Counting down the seconds leading up to a rocket launch is iconic - certainly it seems that every child knows that after "5, 4, 3, 2, 1" comes "Blast off!" However, the countdown can't always have bee …