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 …

Rocks from unexplored far side of the moon help...
on July 24, 2026 at 5:20 pm
Ancient samples from the moon's far side are helping scientists uncover how asteroid impacts shaped the early solar system. The findings challenge decades of thinking about when those impacts occurred and offer new insights into the conditions that influenced Earth's evolution.
Why Europa's hidden ocean may be more difficult...
on July 24, 2026 at 4:00 pm
Europa, one of Jupiter's icy moons, has long fascinated scientists because of what may lie beneath its frozen shell: a global ocean of liquid water. That hidden ocean has made Europa one of the most compelling places in the solar system to study the conditions that might support life. But new research led by Rutgers scientist Lujendra Ojha suggests one of the most promising shortcuts to Europa's ocean may be far more complicated than previously thought.
Should scientists have research 'reserves' on the...
on July 24, 2026 at 11:40 am
The worlds of the solar system are exciting and, so far, mostly pristine places for planetary scientists to study. As space missions continue to travel to Mars, Europa, asteroids and other worlds, questions arise about keeping them safe for continued exploration and observation.
Young rift flanks suggest Venus remains...
on July 24, 2026 at 9:00 am
Venus is an inhospitable place, with temperatures soaring to several hundred degrees Celsius (hundreds of degrees Fahrenheit) and no oceans like those on Earth. Planetary scientists long believed Venus was geologically dormant. However, recent research indicates that Venus remains geologically "alive" and even hosts active volcanoes.
Hawai'i serves as model for Western researchers...
on July 23, 2026 at 6:00 pm
The moon is 384,000 kilometers (239,000 miles) away from Earth, but one of the best places to study its surface is much closer to home. Western planetary scientist Catherine Neish and PhD candidate Sashank Vanga traveled to Hawai'i Volcanoes National Park in June to investigate lava flows that could reveal new clues about the moon's volcanic past.