1.  As a joke, special-effects staffers turned one of them into an asteroid floating among myriad dangerous space rocks.

2.  Then, lithe and slender boys were prized because of their ability to work in the dangerous narrow spaces, but they were often crushed by rock or machine.

3.  But what if there were a satellite designed to scour the most-traveled areas around the Earth for dangerous space flotsam?

4.  Never mind that all this luxury would be in a balloon that would be in an Earth orbit littered with dangerous space junk.

5.  The ozone layer in the upper atmosphere protects the Earth from dangerous space radiation.