A brief history of spaceflight from 1961 to 2020: An analysis of missions and astronaut demographics.
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DOI: 10.1016/j.actaastro.2020.06.004
Abstract: Human spaceflight and the characteristics of people who become astronauts have changed over time. Here we present an analysis of n=1,265 manned spaceflights by n=562 astronauts from 1961-2020 to investigate historical trends over time and… read more here.
Keywords: analysis; time; increased time; first time ... See more keywords