Cosma / Communication / Knowledge / Realm / Physical / Universe / Galaxy
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Introduction1
Astronomic (YouTube Channel)
Astronomic (Facebook)
Dictionary
galaxy : any of the large groups of stars and associated matter that are found throughout the universe — Webster See also OneLook
Thesaurus
Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords
Encyclopedia
Galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component tentatively dubbed dark matter. Galaxies contain varying amounts of star systems, star clusters and types of interstellar clouds. In between these objects is a sparse interstellar medium of gas, dust, and cosmic rays. Dark matter appears to account for around 90% of the mass of most galaxies. — Wikipedia
Galaxy (Encyclopædia Britannica)
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Innovation
Science
What are Galaxies? (NASA Science)
Galaxies (Lunar & Planetary Institute)
Galaxies (Ask an Astronomer, Cornell University)
Galaxies (Eric Weisstein’s World of Astronomy, Wolfram Research)
Galaxies (Wolfram Alpha)
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Preservation
History
Historical Overview of the Discovery of Galaxies (Earth Guide)
Timeline of Knowledge about Galaxies, Clusters of Galaxies … (Wikipedia)
Library
Melvil Decimal System # 523.112 Galaxies (Library Thing)
Library of Congress Subject Heading: Galaxies (Library Thing)
Library of Congress # QB856 Galaxies (UPenn Online Books)
WorldCat, Library of Congress, UPenn Online Books, Open Library
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Participation
Education
Galaxies (Cosmos4Kids)
What is a Galaxy? (Space Place, NASA)
MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources
Community
News
Galaxies (Sky & Telescope)
Galaxies (Astronomy Magazine)
Galaxies (Science Daily)
Galaxy (Phys.org)
Galaxies (Scientific American)
Galaxy (NPR Archives)
Government
Document
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Expression
Humor
Galaxies (Tim Hunkin, The Rudiments of Wisdom Encyclopedia)
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Related
Here are links to pages about closely related subjects.
“Fundamentals”
Law (Constant) Relativity
Force Gravity, Electromagnetism (Light, Color)
Matter (Microscope) Molecule, Atom (Periodic Table), Particle
“Space”
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
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Notes
1. The resources on this page are are organized by a classification scheme developed exclusively for Cosma.