One kind of 'popular science' fun facts that is very popular is to show how many of the individuals belonging to a notable group of people that are left handed, often showing a large disproportionally from the rest of the population. (example with Apollo astronauts, but that is a small sample size) This has been asked about presidents and Nobel prize winners etc., But are there any handedness skewing regarding astronauts too? This discussion suggest such a correlation.

As far as I can see, handedness may have a slight impact on the design of control panels and equipment with chiral properties, like scissors. (In the later case calling for a more neutral design in order to maintain uniform productivity.)

Buzz Aldrin in space suit

Buzz Aldrin, left handed

  • $\begingroup$ Do you count as astronaut any person who has been in space? Or do you exclude people like for example mission specialists? $\endgroup$
    – user
    Feb 17, 2016 at 12:29
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    $\begingroup$ @MichaelKjörling "person who has been in space" makes most sense, but any statistics about a subcategory, like pilots would also be very interesting. (or left-handed people by nationality, gender, program or education by that matter). $\endgroup$ Feb 17, 2016 at 13:11
  • $\begingroup$ I would suggest we use the definition "person who has been in orbit", unless you want to count sub-orbital flights. $\endgroup$ Feb 17, 2016 at 16:03
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    $\begingroup$ @Rikki-Tikki-Tavi The definitions does not really matter, sub-orbital people are fine too, but feel free to exclude them. $\endgroup$ Feb 17, 2016 at 16:07
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    $\begingroup$ It's going to be hard to answer this as many left handed people were forced to be right handers by schools and social pressure. Now that the stigma has gone away we are seeing a higher proportion of lefties out there. $\endgroup$
    – GdD
    Feb 18, 2016 at 9:07

2 Answers 2


It's hard to get a comprehensive statistic of all astronauts, but 1 in 4 of the early US astronauts (Mercury- Apollo) were left handed, including the following:

  • Buzz Aldrin
  • Dick Gordon
  • Charlie Duke
  • Jim Lovell
  • Wally Schirra
  • Ed Mitchell

I can't find a reliable statistic beyond the Apollo era, but I suspect that percentage has gone down. Also note that about 10% of the population is left handed, so the 25% of this era is unusual. From what I can tell, that percentage for more modern astronauts is higher than 10%, but lower than 25%.


Buzz Aldrin were not left-handed, they are public pictures of him signing documents from his right hand. One should always check, as they are many false claims about famous character being lefty: Napoleon ; Charlemagne ; Reagan ; Zuckerberg ; Fidel Castro ; Neil Armstrong I personaly checked all them : they are rightys.

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    $\begingroup$ In the past (and today) left handed children were encouraged or even forced to use their right hand, so photos of signing documents is not necessary conclusive evidence. Can you add some supporting links or cite sources to support your statements? That's generally required for Stack Exchange answer posts. Thanks! $\endgroup$
    – uhoh
    Feb 2 at 0:40
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    $\begingroup$ I am interested in how you personally checked Napoleon's handedness $\endgroup$ Feb 2 at 0:45
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    $\begingroup$ Do you have anything to support your claim? $\endgroup$ Feb 2 at 2:27

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