Why things break in space
A great post by Robert Zimmerman that discusses the 2007 Solar Array Wing repair spacewalk by STS-120 astronauts Scott Parazynski and Doug Wheelock. More importantly, it stressed the point that “things will break” in space, and crews “will have no choice but to know how to maintain and repair their vessels…”
I recommend reading the entire post, but here are a few excerpts, emphasis mine:
ISS is presently our only testbed for studying these kinds of engineering questions. And in 2007, a spectacular failure, combined with an epic spacewalk, gave engineers at the Johnson Space Center a marvelous opportunity to study these very issues.
The results were quite unexpected: The guide wire had broken because it had been hit by a tiny piece of space junk, melting and splitting the wire but damaging nothing else.
Like the sailors of old, space travelers will need to able to repair and even rebuild their spaceships, wherever they are. Any interplanetary spaceship design has got to factor this reality into its design.