How Does Space Travel Affect Natural Aging?

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Discussion Overview

The discussion centers on the effects of space travel on the human body, particularly how these effects may resemble the biological changes associated with aging. Participants explore the implications of microgravity and radiation exposure on astronauts and the potential for aging studies based on these experiences.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants note that changes experienced by astronauts in space can resemble aging, suggesting opportunities for aging studies.
  • Others argue that while there are observable changes, there is no measurable actual aging, citing the example of astronaut Mark Kelly being a millisecond younger than his twin brother due to time dilation effects.
  • One participant emphasizes that the article focuses on biological effects of zero gravity and radiation, rather than relativity and time dilation.
  • A participant challenges the premise of the article, stating it contradicts earlier beliefs that microgravity would benefit the elderly by alleviating the effects of Earth gravity.
  • Concerns are raised about the lack of detailed discussion on radiation exposure in the article.

Areas of Agreement / Disagreement

Participants express differing views on the validity of the article's premise, with some supporting the idea that space travel mimics aging while others contest this notion and highlight the lack of measurable biological aging. The discussion remains unresolved regarding the implications of these effects.

Contextual Notes

Limitations include the absence of detailed measurements regarding radiation exposure and the reliance on definitions of aging and biological changes, which may vary among participants.

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redferry said:
Changes in the body that come from space travel resemble growing older, providing opportunities to perform aging studies on astronauts.
https://www.nmn.com/news/how-does-space-travel-affect-natural-aging

Any validity to this?
Yes, there are various things about being in space (read the article) that affect the body. There is no measurable(*) amount of ACTUAL aging, but the effects can be similar to aging.

* Scott is actually YOUNGER than Mark by about a millisecond but that's not measurable in biological processes in the human body.
 
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phinds said:
Yes, although not really, with current technology. Differential aging is real and astronaut Mark Kelly, I think it is, is about an added millisecond younger than his twin brother compared to what he would be if he had not gone to space for a year. The difference can be computed but cannot be measured into biological functions.
That's true, but not what the article is about. It's talking about biological effects of zero gravity and radiation hazards and what have you, not relativity.
 
Ibix said:
That's true, but not what the article is about. It's talking about biological efects of zero gravity and radiation hazards and what have you, not relativity.
Yep. I totally edited the post before I saw your post, having realized that was not what the article was about.
 
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The premise of this article -- that prolonged microgravity* leads to biological changes in the human body similar to aging -- contradicts a meme common before the successful NASA Apollo missions: that microgravity environment should greatly benefit the elderly released from the drag of Earth gravity.

*I saw only one brief mention of radiation exposure with no measurements or discussion.
 
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