Pluto has effectively no atmosphere so I think if you’re standing on its surface and your boots are well-insulated then you’re effectively in a vacuum thermos - you’ll actually overheat rather than freeze and taking your helmet off won’t make a difference.
(Of course the helmet is still important for breathing… And then later water from your body will gradually boil off into space and cool you that way until you’re freeze-dried, but that’s not really a concern for living astronauts.)
Remember the space travel episode where the nerdy kid took off his helmet on Pluto? I’m still a little traumatized.
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You may have been mislead…
Pluto has effectively no atmosphere so I think if you’re standing on its surface and your boots are well-insulated then you’re effectively in a vacuum thermos - you’ll actually overheat rather than freeze and taking your helmet off won’t make a difference.
(Of course the helmet is still important for breathing… And then later water from your body will gradually boil off into space and cool you that way until you’re freeze-dried, but that’s not really a concern for living astronauts.)
I assume you’re quoting Ms Frizz as she lectures the boys frozen head…