The question "Who are the two people lost at space?" is open to interpretation, as there isn't a single, universally agreed-upon definitive answer due to the nature of "lost" in the vastness of space. However, based on the common understanding of individuals whose fate is unknown in space, a relevant answer can be provided.
It's important to note that the provided reference discusses the Challenger disaster. While tragic, the crew did not reach the internationally recognized boundary of space (the Karman Line), therefore they would not be considered "lost in space."
Considering scenarios where individuals might be considered "lost," the following possibilities exist:
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Lost contact: If a spacecraft lost contact with Earth, and the crew's fate is unknown, they could be considered "lost." In this scenario, the number of people "lost" would depend on the crew size.
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Unaccounted for due to an accident or malfunction: If a catastrophic event occurred in space, and some crew members could not be accounted for, they might be considered "lost."
Without more specific parameters in the question, it's impossible to definitively name two individuals. The query itself is based on incomplete information, as there is no readily available or famous incident of only two astronauts being lost in space, without any verifiable confirmation.
Therefore, given the ambiguity and lack of specific known instances that match the query perfectly, answering with specific names would be inaccurate.