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| ||8A20.64||[:Earth-Moon-Sun Model]||A 10" globe, a painted tennis ball, and a 100 W bulb are used to represent the Earth-Moon-Sun system|| |
Solar System Mechanics
PIRA classification 8A
8A10, Solar System Mechanics
PIRA # |
Demonstration Name |
Abstract |
8A10.10 |
Orrery model |
A mechanical model of the inner planets. |
8A10.10 |
planispheric planetarium |
Description of a homemade planetarium. |
8A10.10 |
small planetarium |
Description of a small homemade planetarium dome. |
8A10.11 |
locating stars |
A simple analytical method at the descriptive astronomy level for locating stars. |
8A10.14 |
diurnal motion |
Punch holes in a can bottom in the big dipper pattern and place over a point source of light. Rotate the can. |
8A10.15 |
day & night |
|
8A10.16 |
sundial |
A Plexiglas model of a sundial. |
8A10.16 |
horizontal sundial |
An analytic solution for determining the markings on a sundial and a description of construction. |
8A10.20 |
local zenith |
|
8A10.21 |
precession of the equinox graph |
A graph that shows the precession of the equinox from 1890 to 2000 and a discussion of its pedagogical value. |
8A10.25 |
phases of the moon |
View a ball illuminated by a distant light with a tv camera as the angle between the ball and light varies. |
8A10.26 |
phases models |
Illuminated models for showing the phases of Venus and the Moon. |
8A10.30 |
eclipse models |
|
8A10.31 |
Eudoxus: homocentric spheres models |
Two homocentric models of Eudoxus: one shows the motion of the sun, the other shows retrograde motion. |
8A10.32 |
earth/moon system |
Add abstract in Handbook.FM |
8A10.40 |
pinhead earth |
|
8A10.50 |
horizon astronomy model |
|
8A10.51 |
Cinhelium |
|
8A10.52 |
Ptolemaic and Copernian orbits |
An analog computer (circuit given) displays orbits and epicycles on an oscilloscope. |
8A10.55 |
retrograde motion model |
Two balls connected with a rod fixed through one ball and sliding through the other orbit on common ficus. |
8A10.55 |
retrograde motion model letter |
Pointer to AJP 43,693(1975). |
8A10.55 |
retrograde motion model |
Two balls driven by independent clock motors are connected with a rod fixed through one ball and sliding through the other. |
8A10.60 |
epicycles |
An Orrery caries a small flashlight on a rod between Earth and Jupiter to project epicycloidal motion. |
8A10.60 |
epicycles |
A elliptical Lucite dish has two arms attached to one foci. Place some ball bearings between the two arms and rotate the rear arm at constant angular velocity. |
8A10.60 |
epicycles |
A diagram of how to make a fairly simple crank device to trace out elliptical through cusped figures with a penlight. |
8A10.65 |
comet orbit |
|
8A10.80 |
celestial sphere |
A simple model celestial sphere is made from a round bottom flask. Pictures. |
8A10.80 |
celestial sphere |
A simple model celestial sphere is made from a round bottom flask. Pictures. |
8A10.90 |
cross-staff |
Cut a meter stick into 57 1/3 cm and 42 2/3 cm. (At 57 1/3 cm one degree equals one cm.) Some refinements. |
8A10.91 |
heliostat |
Picture of a heliostat |
8A20, Planetary Geology
PIRA # |
Demonstration Name |
Abstract |
8A20.10 |
globes |
|
8A30.10 |
cratering |
|
8A20.30 |
cratering |
Add abstract in Handbook.FM |
8A20.21 |
planetary density model |
Add abstract in Handbook.FM |
8A20.41 |
make a comet |
Add abstract in Handbook.FM |
8A20.42 |
Ed's comet |
Add abstract in Handbook.FM |
8A20.64 |
[:Earth-Moon-Sun Model] |
A 10" globe, a painted tennis ball, and a 100 W bulb are used to represent the Earth-Moon-Sun system |
[:Demonstrations:Demonstrations]
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