However, if Jupiter were slightly bigger or had a rather less regular orbit, scientists believe the other solar planets would follow far less predictable orbits.

And since satellites have predictable orbits, and it is not hard for other countries to suspend their military activities when they pass over.

This isn't particularly difficult because the satellites travel in very high and predictable orbits.

The planets moved along their predictable orbits, and sometimes a bright asteroid or comet was visible, but they were like spacecraft wandering by: obstacles in the foreground, not part of the view.

Furthermore, they calculate that many other satellites of the outer planets may have gone through similar processes before ending up in their present, predictable orbits.

They can photograph the ground from their lofty orbits as well as low-flying planes can, but unlike planes, they follow predictable orbits.

What had looked to be a reasonable, predictable elliptical orbit through Rukbat's system proved to be even more bizarre, at an angle to the ecliptic.

Large pieces of junk would still cut most tethers, including the improved versions listed hereinbefore, but these are currently tracked on radar and have predictable orbits.