So what do you think about that ball that just fell out of the sky

I'm just going to assume that there's nothing interesting behind it.

http://ca.news.yahoo.com/space-ball-drop…

Of course, it's an article from Yahoo!, so you know how they are.

These spheres are from rockets and satellite motor control systems. They contained either fuel, or nitrogen or helium which is used to move engine nozzles via pneumatic mechanisms during launch and positioning. One satellite/rocket may have several of these mounted to it. They are usually wrapped in asbestos or fiber-glass fabric for insulation, which has burned off during re-entry. This one likely came from a recent satellite decent into the Earth's atmosphere. Because they are light and empty inside, they may float around up there for months before finally dropping to the ground. They are usually made of stainlees steel or titanium, which is worth some money.

Nothing but space junk, we need to clean out the orbit and make it safer and cleaner, but there isn't a practical way of doing it yet.