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Originally posted by Alaskan Man
1. Cold Welding
Fact: If two pieces of metal touch in space, they become permanently stuck together
This may sound unbelievable, but it is true. Two pieces of metal without any coating on them will form in to one piece in the vacuum of space. This doesn’t happen on earth because the atmosphere puts a layer of oxidized material between the surfaces. This might seem like it would be a big problem on the space station but as most tools used there have come from earth, they are already coated with material. In fact, the only evidence of this seen so far has been in experiments designed to provoke the reaction. This process is called cold welding.
Now thats neat, To bad anything from earth seems to already have the oxidation that keeps this from happening, I think space stations might come together a little easier if they just stuck together like that.
Hope everyone enjoyed this list as much as I did
Originally posted by above
It is 330 miles per SECOND, or 118800 mph
"Fact: If two pieces of metal touch in space, they become permanently stuck together This may sound unbelievable, but it is true."
"In space: Mechanical problems in early satellites were sometimes attributed to cold welding. However, in 2006, Henry Spencer stated that the phenomenon of spontaneous cold welding in outer space is "basically a myth", pointing out that "there are no documented cases of it actually occurring in orbit, except in experiments deliberately designed to provoke it (with susceptible materials, great care to avoid contamination, and deliberate mechanical removal of oxide layers, etc.)."
Originally posted by acrux
reply to post by Alaskan Man
Consequently, the earth is slowing in rotation by about 0.002 seconds per day per century.
Is this per day or per century.?
The record for the fastest spacecraft of all is held by the twin Helios probes that were placed in orbit around the Sun. Both these vehicles reached top speeds of around 150,000 mph (250,000 km/h) at closest approach to the Sun in their highly elliptical orbits, Helios 2 being marginally the swifter.