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3 year old Jonathan...
3D Head Modeling Software
3D Printing!!! -- A Real Car
Aims of Education
Alexander Calder's Circus
Anatomy of a B1 Battle Droid
Anatomy of a Human
Anatomy of Musical Instruments -- Guitar History
Anatomy of Musical Instruments -- Saxophone
Anatomy of Musical Instruments -- Violin
Architecture -- Apartment Floor Plan
Architecture-- Filoli Gardens and House
Art Project by Google
Artificial Intelligence = AI
Astronomy - Messier Chart
Astronomy - Very Large Telescope
Astronomy -- Constellations
Astronomy -- Galaxies
Astronomy -- Hands-on Universe
Astronomy -- IMax Saturn Spaceship Flyby...
Astronomy -- Night Sky Map
Astronomy -- Orrery Solar System Kit
Astronomy Picture of the Day
Automata - Toys that Move
Batman Paper Model
BioMedical Engineering -- Organ Regeneration
BioMedical Engineering -- Geometry Research about Viruses
Bongard Pattern Recognition Puzzles
CAD Images of Pythagorean Theorem
Careers in Design
Ceramic Tile Designs Worldwide
Clowns Go On Vacation -- Video in Progress
Design Education Blog (K-12)
Doodles -- with Vi Hart
Engineering -- Introduction
Engineering -- Mechanical Engineering -- MIT Open Courseware
Engineering for the Other 90%
Engineering HS Model Bridge Contest
Engineering of Everyday Things -- Page 7 Xray Photographs
Engineering of Everyday Things -- Curriculum Outline
Engineering of Everyday Things -- Page 1 Photograph Introduction
Engineering of Everyday Things -- Page 2 Lesson Plan
Engineering of Everyday Things -- Page 3 Teachers' Guide
Engineering of Everyday Things -- Page 4 Cool Stuff_Book Cover
Engineering of Everyday Things -- Page 5 Cool Stuff_ Book Photos
Engineering of Everyday Things -- Page 6 Cool Stuff_Book Photos_2
Engineering, Go For It!
Evolution of Feathers
Fairchild Tropical Botanic Garden
Flickr_ Math World photos
Fractal Arts Tutorial
Fractals -- What are Fractals?
Fractals and Benoit Mandelbrot
Fractals PBL Curriculum
Geometric Delights -- a blog
Geometry Course -- Open Reference interactive excellent course
Geometry History & Quotations
GeoSphere Gears in Motion
Glass Ball Juggler
GPS = Global Positioning System
Graphic Arts and Design
Hathi Trust -- Digitized Books
Heilbrunn Timeline of Art History
History of Engineering
History of Mathematics
History of the Computer Timeline
How do you... List of 100 Topics
How it's Made -- Science Channel
How to... Instructional Essay Writing
Human Geometry & the Performing Arts
India Arts - Kolam
Jobs, Steve - Apple
Kinetic Geometry Sculpture
Mathematics and Multimedia
Moon Express, Inc.
Museum of Mathematics
National Geographic Magazine
Nets for Geometric Solids
NOVA -- PBS TV -- Science
Orchids (and other Flowers)
Origami -- Erik Demaine -- MIT Geometry
Origami -- Robert Lang
Origami -- Sara Adams
Origami Resource Center -- K-12
Paper Craft -- Valentine's Cake
Paper Models of Polyhedra
Papercraft and Model-Building
Patents -- Apple, Inc.
Patents -- Google Search
Privacy in the Digital World...
Quilt Design Patterns
Spirals in Nature
Sports Courts and Fields
Tiffany Stained-Glass Lamps
Tools of Science and Math
Tools of Science and Math 2
Tools of Science and Math 3
Tools of Science and Math 4
Tools of Science and Math 5
Toys from Trash
Tsunami Wave (Physics) -- Tragedy in Japan
Union of Concerned Scientists
Wikis in the Classroom
Astronomy -- Orrery Solar System Kit
Astronomy -- Orrery Solar System DIY Kit
Mechanical planetaria were already known in ancient Greece,
though the planetary orbits with their loops, that the Ptolemaic world model constructed
around a stationary earth at its centre, most likely cannot have been replicated mechanically.
The most famous example is the Antikythera mechanism, discovered in a shipwreck, which was much like a calculating machine.
It is said that Archimedes, too, was able to demonstrate mechanically the orbits of the Sun and Moon.
Almost all of the mechanical planetaria we know are based on the ideas of Nicolaus Copernicus (1473 -1543),
who regarded the Sun as the centre of the world.
He proclaimed that the Earth does not remain in place but rather moves in three ways:
1. it revolves once in 24 hours
2. it orbits around the Sun once per year on a circular path
3. it turns its axis in such a way that it always points in the same direction and not towards the Sun.
Despite heavy resistance from the church, this world model continued to spread and,
through improvements made by numerous scientists, evolved into the generally accepted scientific world model of today.
One of these scientists was Johannes Kepler, who discovered the elliptical nature of the planetary orbits.
At the beginhing of the 18th century the Earl of Orrery and other English aristocrats asked watchmakers to manufacture
crank-driven mechanical models of the planets, which are called orreries since that time.
One of the largest and most famous movable planetariums was built; by the Frisian Eise Eisinga in the years 1774 to 1781
in the town of Franeker; where it is still exhibited.
Today the, name "planetarium" is mostly used for projection planetariums like those that were first constructed by
the Zeiss optical company in Germany at the beginning of the last century.
These project the stars onto the inside of a large dome.
The AstroMedia* Copernicus Planetarium stands in the tradition of the mechanical, crank-driven planetary models
that are exhibited by selected museums as masterpieces of the watchmaking and precision engineering arts.
Its simple drive belt design, the robust cardboard construction and the affordability of an assembly kit
make this interesting and instructive device available to a larger public once again.
Things Needed For Assembly:
Check the website link for further information...
help on how to format text
Turn off "Getting Started"