Planetary System

Cosma / Communication / Knowledge / Realm / Physical / Universe / Planetary System


Life and Death of a Planetary System (NASASolarSystem, YouTube Playlist)


Planetary system is a set of gravitationally bound non-stellar objects in or out of 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 the planetary system revolving around it, including Earth, forms the Solar System. The term exoplanetary system is sometimes used in reference to other planetary systems. — Wikipedia

List of multiplanetary systems (Wikipedia)




James Webb Space Telescope (YouTube Channel)

TRAPPIST-1 is an ultra-cool red dwarf star in the constellation Aquarius. It has a mass of about 9% that of the Sun, a radius slightly larger than the planet Jupiter, and a surface temperature of about 2,566 K (2,293 °C). The star is located at a distance of 40.7 light-years (12.47 pc) from the Sun and is estimated to be 7.6 billion years old, making it older than the Solar System. — Wikipedia

Note: These are 360° Videos — press and hold to explore!

Exoplanets (NASA Jet Propulsion Laboratory, YouTube Playlist)

Spitzer VR (Official Site)

Exoplanet Travel Bureau (NASA)

Beyond Our Solar System (NASA)




WorldCat, Library of Congress, UPenn Online Books, Open Library



Planetary Systems (Cosmos4Kids)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources



International Astronomical Union (IAU)
Minor Planet Center (International Astronomical Union)
The Planetary Society


Exoplanets News (NASA)
Planetary System (Astronomy Magazine)
Planetary System (
Planetary System (NPR Archives)



Planetary System (



Here are links to pages about closely related subjects.

Knowledge Realm


Law (Constant) Relativity
Force Gravity, Electromagnetism (Light, Color)
Matter (Microscope) Molecule, Atom (Periodic Table), Particle

Universe (Astronomical Instrument)
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Our Neighborhood
Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.