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Fact #27

A Month in Space Makes You 2.5 cm Taller

Without gravity the spine stretches, and astronauts grow taller

Justin Lee, Dumb Game Lab ·

A Month in Space Makes You 2.5 cm Taller
Photo: NASA, Public domain
Short answer After about a month in weightlessness, height increases by roughly 2.5 cm, and tears cannot flow but ball up instead.

An astronaut watches a drink float inside the space station. Strange things happen to the body up here too.

On Earth, gravity presses on your spine all day. You are a bit taller after a night lying down because that pressure eases for a while.

In space this pressure is gone altogether. After about a month, height goes up by roughly 2.5 cm.

YauIf I went to space I could be a basketball player

An astronaut floating aboard the station.
Photo: NASA, Public domain

An astronaut floating aboard the station. With nothing to hold up, the bones do less work too.

The bones weaken in return. On the Russian Mir station, an average loss of 1 to 2 percent a month was recorded.

Even if you cry, the tears don't run down. They stick together and ball up.

YauSo in space you can cry and your face stays dry

Sources

  1. Wikipedia: Effect of spaceflight on the human body
  2. Wikipedia: Spaceflight osteopenia

Photo credits

  • ISS-51 Jack Fischer watches his floating drink inside the Unity module.jpg, NASA, Public domain (source)
  • Leland Melvin floating in Airlock.jpg, NASA, Public domain (source)

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