Originally Posted by Martian

Where Are They?
There are two groups of Trojans, known as the Trojans and the Greeks (fans of Homer will get the reference). They occupy the Lagrangian points around Jupiter (the explanation of what Lagrangian points are is fairly involved; suffice to say that the ones we're talking about are two stable points where objects may share an orbit with another object or planet). This puts them between 5 and 5.5 AU out (approximately 370 to 420 million miles from Earth).