Droids on the ISS

Saw this on Free Republic:

Six years ago, MIT engineering Professor David Miller showed the movie Star Wars to his students on their first day of class. There's a scene Miller is particularly fond of, the one where Luke Skywalker spars with a floating battle droid. Miller stood up and pointed: "I want you to build me some of those."

So they did. With support from the Department of Defense and NASA, Miller's undergraduates built five working droids. And now, one of them is onboard the International Space Station (ISS).

How cool is that? The article goes on why small satellites are needed and how difficult it is to gather them together to work on moving other vehicles in space. (Ever been in a crowd of people?)

Tiny satellites are a hot new idea in space exploration: Instead of launching one big, heavy satellite to do a job, why not launch lots of little ones? They can orbit Earth in tandem, each doing their own small part of the overall mission. If a solar flare zaps one satellite—no problem. The rest can close ranks and carry on. Launch costs are reduced, too, because tiny satellites can hitch a ride inside larger payloads, getting to space almost free of charge.

But there's a problem: Flying in formation is trickier than it sounds. Ask a crowd of people to line up single file, and they'll be able to figure it out and do it rather easily. Getting a group of orbiting satellites to do the same thing, it turns out, is extremely hard.