Wiktionary
n. (plural of planetary system English)
Usage examples of "planetary systems".
Other planetary systems now look to be a cosmic commonplace, maybe even worlds something like the Earth.
Some stars and planetary systems are billions of years younger, others billions of years older.
Some think that the equivalent of the step from the emergence of trilobites to the domestication of fire goes like a shot in all planetary systems.
The Old Republic, a galaxy - wide government of planetary systems, is formed in the Core Worlds.
My mind did not accept that entire planetary systems could be invisible.
Not much else was known about them, except their inexplicable penchant for aiding the more ephemeral races to explore and colonise new planetary systems.
However, to avoid causing orbital perturbations and all the attendant disruptions, the ports were never projected into planetary systems, but well away in the surrounding voids.
We pull down or change whole planetary systems and destroy peoples who might threaten our monopoly of time.
I only had to sign over the profits on a couple of planetary systems in Uncle Hafiz's name, he might not even kill me when he finds out what he's paying for, but I don't plan to stick around and check it out.
But for reasons that still were not entirely understood, star systems with poorly developed planetary systems also seemed to produce a large number of dark comets--and Inferno shared its star with only two planets barely large enough to qualify as gas giants, a wizened little asteroid belt, and the usual sorts of deep space debris--comets, asteroids, planetesimals, and so on.
Even the voids of space around planets and other habitats, and the regular traffic lanes within planetary systems, were monitored to a degree that would have struck Terrans as pointless.
And do it in a few hours, applying the mechanics of planetary systems to the tiny orbital segments observed.