Cosma / Communication / Knowledge / Realm

Rebecca tells her brother a funny story about a letter Jane Crofut received from a minister.

It was addressed:

Jane Crofut; The Crofut Farm; Grover’s Corners; Sutton County; New Hampshire; United States of America; North America; Western Hemisphere; the Earth; the Solar System; the Universe; the Mind of God. — Thornton Wilder, Our Town (1938)




knowledge : the sum of what is known : the body of information, principles and truth acquired by humankind — Webster

realm : (1) kingdom (2) sphere, domain — Webster

knowledge realm : a kingdom, sphere, or domain for holding the body of information, principles and truth acquired by humankind — M.E. Hopper, Cosma 2



History is philosophy teaching by example, and also warning; its two eyes are geography and chronology. — James A. Garfield

The Mechanical Universe (CalTech, YouTube Channel)
Harmonies of the World by Kepler (Encyclopædia Britannica)
May 1618: Kepler’s Discovery of Solar System Harmonics (American Physical Society)
Musica Universalis (Wikipedia)
Harmonices Mundi (Johannes Kepler, Wikipedia)



This is the first in a series of Toy Worlds featured on many pages on this site.

Wander through 3D galleries with links to resources on this site and the Web.

Click the 360° image below to begin exploring, click the “more functions” menu in the upper right for controls and click “i” buttons on/off for links to experiences, use “portals” to visit other Toy World Realms.

You can also explore this on RoundMe.
If you have trouble seeing this on RoundMe, then try using an updated or different browser.

There is also a version in SecondLife.   Click the image below to explore it.

Cosma Welcome Area SL

More Worlds …



Here are links to pages about closely related subjects.

Knowledge Realm

Geography Navigation, Map
Chronology Calendar, Clock





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


Terrestrial   (Earth)

Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Fish Seahorse, Ray, Shark
Amphibian Frog, Salamander
Reptile Turtle, Tortoise, Dinosaur
Bird Penguin, Ostrich, Owl, Crow, Parrot
Mammal Platypus, Bat, Mouse, Rabbit, Goat, Giraffe, Camel, Horse, Elephant, Mammoth
Walrus, Seal, Polar Bear, Bear, Panda, Cat, Tiger, Lion, Dog, Wolf
Cetacean Whale, Dolphin
Primate Monkey, Chimpanzee, Human



Self Body, Brain
Society Culture, Family, Dwelling, Fashion, Celebration

Afro-Eurasia Africa, Europe, Asia
America North, Central, South, Caribbean
Oceania Australia, New Zealand
Polar Regions Arctic, Antarctica



Fictional, Mythical, Celestial



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

2.   Collecting hundreds of thousands of Knowledge Resources over the course of decades is far easier than you would probably think. However, figuring out how to organize them in order to make them accessible is hard. Adding the additional constraint of needing to organize them into a literal map in order to create 3D interfaces to enable spatial Knowledge Navigation is a very sticky problem. There is a long history of how to deal with Knowledge Organization problems, but there is no perfect solution — there are only a series of trade-offs in adopting any ontology. In practice, Cosma does not use any one specific existing system to “layout” knowledge such as the Great Chain of Being or the Tree of Diderot and d’Alembert. Instead, all of the virtual spaces that serve as 3D interfaces to Cosma are laid out into “Realms” based upon an amalgamation of taxonomies for organizing reality into hierarchies and physical maps.