planetary systems
Worlds around suns
A planetary system is a star and the celestial bodies gravitationally bound to it—planets, moons, asteroids, comets.
Our solar system is one planetary system; astronomers have discovered thousands of others orbiting distant stars.
The term distinguishes individual star-and-planet arrangements from galaxies or the universe at large: The Kepler mission identified numerous planetary systems with Earth-like worlds.
- alien worldsPlanets outside our system
- orbitCurved celestial path
- cosmic danceMovement of astronomical bodies
- protostarsStars before nuclear ignition
- ringClosed curve shape
habitable zones · astronomy · star · belt · circumstellar · binary systems · satellite · nebulae · red dwarfs · orbital mechanics · dust · brown dwarfs · astrophysics · celestial · comets · Kepler · cosmos · orrery
- systemsecosystems, ecosystem, biological systems, transportation network, communication systems
- Alien Lifeextraterrestrial life, extraterrestrial intelligence, alien intelligence, first contact, biosignatures
- astronomystars, moon, sun, star, telescope
- space explorationrockets, Saturn V, satellites, mission, Falcon Heavy
- cosmic matterstars, galaxies, dark matter, cosmic dust, asteroids
- galaxy partsgalactic core, spiral arms, galactic center, spiral arm, nucleus
planetary systemsgalaxies
Gravitationally bound stellar assemblies
superclusters · the universe · voids · moons · asteroids
system, planet, planets, systematic, planetary, systematize, systematically, planetarium, exoplanet