solar systems

Stars with orbiting worlds

A solar system is a star and all the objects that orbit it—planets, moons, asteroids, comets.

Our solar system has the Sun at its center with eight planets.

The term extends loosely to any planetary system: Scientists discovered a solar system with three habitable worlds.

Figuratively, it can describe any central body with satellites orbiting around it.

Opposites
astronomical scale

solar systemsgalaxies

Gravitationally bound stellar assemblies

superclusters · atoms · subatomic particles · the universe · intergalactic space

cosmic organization

solar systemsintergalactic space

Region between galaxy clusters

deep space · black holes · dark matter · entropy

existence/location

solar systemsEarth

Our world

earthbound · microcosm · inner world · ground level · subterranean

Family

system, solar, systems, systematic

Familiarity
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Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G