Wednesday, December 15, 2010

How Would NASA Rescue An Astronaut Who Floated Away


What would happen if an astronaut began to float in space away from the international space station(ISS) during an EVA, which stands for Extravehicular Activity? How NASA could intervene? How astronaut could then return to their homes? Here's how.
This has never happened and NASA believes that they will never have to face such a situation. Certainly now, astronauts from floating usually not really in the air.
Outside the ISS, they are still attached to the probe with a braided steel cable. And when it comes to walk in space in tandem, the astronauts are increasingly connected to one another.
Still, as if to astronaut away from the space station, He simply used a displacement module named as SAFER Simplified Aid For EVA Rescue, also "safer" if it is translated literally.
This unit controlled by a small joystick that any astronaut during an exit door, is presenting the back and ballast equipped with a propulsion system powered by nitrogen. It does not take so long in the back inside the station not to run out of oxygen.
In a worst-case situation, the only rescue option, according to Oberg, would be for a second astronaut to link together several tethers end-to-end, attach them to the station, and then use his Safer pack to get over to his crewmate and haul him in. Certain conditions could make a rescue easier, he says. If an astronaut floated away more or less at a right angle from the station's orbit, orbital dynamics (which require too much math to explain here) dictate that he would float back toward the station in about an hour.

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