Wiktionary
n. A group of smaller bodies (such as planets or asteroids) that orbit one one or more stars.
Wikipedia
A planetary system is a set of gravitationally bound non-stellar objects in orbit around a star or star system. Generally speaking, systems with one or more planets constitute a planetary system, although such systems may also consist of bodies such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals and circumstellar disks. The Sun together with its planetary system, which includes Earth, is known as the Solar System. The term exoplanetary system is sometimes used in reference to other planetary systems.
There are at least known planetary systems, including systems consisting of multiple planets as of . These systems contain more than known exoplanets. Debris disks are also known to be common, though other objects are more difficult to observe.
Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water, and thus the capacity to harbor Earth-like life.
Usage examples of "planetary system".
Whether these planets are the remnants of an earlier planetary system that somehow survived the supernova explosion that produced the pulsar, or whether they formed from the resulting circumstellar accretion disk subsequent to the supernova explosion, we do not know.
In yet another way the same forces function as movers and stirrers of the macro-telluric processes of the earth, and beyond this of the happenings in the body of our planetary system, including the movements of the various planets.
Arrakis is the only planet in the Canopus planetary system to harbor organic life forms Life on Arrakis has been subject to harsh conditions during its history Along with the local star group there is an extensive dust cloud that permeates the Canopus near space This dust cloud was first detected by the Arrakian astronomer Chelin m 12704 The consequences of the cloud were not fully recognized until 12984 when evidence was found that correlated ice age-like penods with the dust cloud opacity The peculiar velocity of Canopus carried it and the plane tary system through regions of .
Aristarchus was the first person to hold that the Sun rather than the Earth is at the center of the planetary system, that all the planets go around the Sun rather than the Earth.
It is, somehow, the source of power that can impose an interdiction field over an entire planetary system.
People looked at charts that showed the warp network as lines connecting dots, and they tended to lose sight of the fact that each of those dots was a whole planetary system - hundreds of thousands of cubic light-minutes of nothingness in which to hide.
People looked at charts that showed the warp network as lines connecting dots, and they tended to lose sight of the fact that each of those dots was a whole planetary system -- hundreds of thousands of cubic light-minutes of nothingness in which to hide.
The cursor flashed across the planetary system to the Cimmaron warp point.
People looked at charts that showed the warp network as lines connecting dots, and they tended to lose sight of the fact that each of those dots was a whole planetary system-hundreds of thousands of cubic light-minutes of nothingness in which to hide.
We don't have a name for this star, we aren't given its statistics, we lack any information concerning its planetary system, if it has one.
Anyway, this scrap of poetry purported to describe the planetary system of which Earth was part.
For brief minutes they'd been in a planetary system which their navcomp made perfect sense of.
The nearest populated planetary system, Septagon Central, was far enough away to be saved by the heavy radiation shielding on its orbital republics.