Citation

Freiberg AS, Zhou S. Am. J. Med. 2020; ePub(ePub): ePub.

Copyright

(Copyright © 2020, Elsevier Publishing)

DOI

10.1016/j.amjmed.2020.05.023

PMID

32592663

Abstract

With the advent of commercial human spaceflight, it is important to analyze the historical safety of humans travelling to, in, and from space. We break down the fatality rates of human spaceflight and compare them to those of several terrestrial transportation modes. We created a database of human space travel, containing the vehicles, launches, and the total time and distance travelled. For the four fatal space missions and 18 fatalities, we determined the fatality rates, calculated by several methods, including rates per trip, person, and distance travelled, stratified by the mission segment affected. Two of the 326 launches did not reach space, and eight others were suborbital. There have been 1285 person launches to space; the total time in space is estimated to be 55,939 person days and the total distance traveled is approximately 23.5 billion person miles. One fatal trip occurred on the way to orbit and the other three during the return. There has yet to be a fatality in orbit and there have been none on any space flight since 2003. The per trip and per person fatality rates are 1.2% and 1.4%, but the per mile rate is much lower, depending on the flight segment.

Language: en

Keywords

Fatality Risk; Human Spaceflight