Oxygen

i know the reason (for oxygen) but i need a proper definition.

to last them for the hours they are outside their ship doing space stuff.. like walking on the moon or floating outside the shuttle

7 Responses

1. Carmie Says:
   May 11th, 2010 at 4:09 am

   So they can live? duh
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2. biker Says:
   May 11th, 2010 at 4:59 am

   I don’t know for sure but I suspect you’ll find they are AIR tanks not oxygen. There is no air in space and humans need air to breath.
   References :
   SCUBA diving and working the the space industry (loosely)

3. Fr3sa Says:
   May 11th, 2010 at 5:37 am

   because in space there is no oxygen. so they need to breathe…
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4. Marcus Says:
   May 11th, 2010 at 6:27 am

   seriously??? how old are you like 2?
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5. John B Says:
   May 11th, 2010 at 6:55 am

   because they can not hold their breaths very long
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6. Urwumpe Says:
   May 11th, 2010 at 7:08 am

   For breathing. Simple as that. There is no significant atmosphere in space, that you could breathe, you need to keep the 20 kPa partial pressure of oxygen inside the suit so the astronaut does not die.

   If you would have lots of electrical power, you could use electricity for splitting CO2 into oxygen again, but this option is usually not possible for spacecraft. It was already a major achievement that one of the Space Shuttles has special CO2 filters that can be heated to clean them from CO2 again, making the filters last longer.
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7. Autumn Says:
   May 11th, 2010 at 7:36 am

   to last them for the hours they are outside their ship doing space stuff.. like walking on the moon or floating outside the shuttle
   References :

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