Planetary System

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

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Adventures

Explore related posts on Cosma …

Exoplanet Junket - This week NASA released a new project that they’ve dubbed the Exoplanet Travel Bureau. The core of the project consists of a set of interactive 360° images that show “imagined” surfaces of five exoplanets (TRAPPIST-1e, Kepler-16b, Kepler-186f, PSO J318.5-22 and HD 40307 g). Here are three articles about the experience. This Brilliant Interactive From NASA … Continue reading Exoplanet Junket
TRAPPIST-1 - You’ve probably heard that NASA has found a trove of “Earth-like” planets circling the TRAPPIST-1 system roughly 40 light years away, but just in case you haven’t, here’s a short video from NASA/JPL about the discovery. NASA Jet Propulsion Laboratory (YouTube Channel) NASA Jet Propulsion Laboratory (Official Website) Most entertainingly, here’s a 360° YouTube video … Continue reading TRAPPIST-1

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Inspiration

AstroCappella (YouTube Channel)
AstroCappella: A Musical Exploration of the Universe (Official Site)
The Chromatics: Full Spectrum A Cappella (Official Site)

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Innovation

Science

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

Planetary Systems (NASA Science)

Planetary System Videos (ViewSpace, Space Telescope Science Institute)
Other Solar Systems, Other Earths Videos (ViewSpace, Space Telescope Science Institute)

Planet and Star Formation (Max Planck Institute for Astronomy)

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Preservation

History

The Discovery of Planets Outside our Solar System (Space and Beyond Box)
Studies of Other Solar Systems (Encyclopædia Britannica)

Library

DDC: 523.4 Planetary Theory (Library Thing)
Subject: Planetary System (Library Thing)

Subject: Planetary Theory (Open Library)

LCC: QB 361 Planetary Theory (UPenn Online Books)

LCC: QB 361 Planetary Theory (Library of Congress)
Subject: Planetary Theory (Library of Congress)

Subject: Planetary Theory (WorldCat)

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Participation

Education

Planetary Systems (Cosmos4Kids)
Solar Systems (Space Scoop)

Other Solar Systems, Other Earths Interactive (NASA’s Universe of Learning)

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

Community

Organization

International Astronomical Union Division F – Planetary Systems and Astrobiology
The Planetary Society

News

Exoplanetary Systems (NASA)
Planetary Systems (JSTOR)
Planetary Systems (Astronomy Magazine)
Planetary Systems (Phys.org)

Recent News from Phys.org …

Q&A: An Earth-like planet with two suns?
on October 3, 2026 at 5:00 pm
A nearby star system with two suns could potentially support an Earth-sized planet in a region where liquid water could exist, according to a new paper examining the dynamics of the system.
Team selected for NASA program to explore...
on October 2, 2026 at 11:20 pm
NASA has selected a Planetary Science Institute–led proposal to investigate whether a potentially large underground cave extends beyond the opening of a lunar pit. Such a cave may one day provide a safe haven for astronauts to escape the radiation and extreme temperature swings present at the lunar surface.
What space travel teaches us about sleep and...
on October 2, 2026 at 4:00 pm
On Earth, most of us rarely have to think about the signals that keep our internal clocks aligned. The sun rises, daylight changes, darkness arrives and morning comes again.
Where the waters meet: Connecting global limits...
on October 1, 2026 at 10:00 pm
Human activity and climate change are putting growing pressure on water resources, disrupting the predictability of the water cycle and changing the availability and quality of freshwater. IIASA researchers and partners have developed a new framework for guiding water management and planning at the river basin level, derived from the existing Global Water Planetary Boundary.
Webb provides crash course on planet-shattering...
on October 1, 2026 at 10:00 pm
In the early history of our solar system, scientists theorize that a Mars-sized object called Theia smashed into the infant Earth, vaporizing massive amounts of rock and blasting it into space. Some of that material coalesced into the moon, where NASA's Artemis program is returning humans, preparing for Mars and shaping the future of space exploration.