Equatorial Ring

[M | t+ | ★]
Model of Ptolemy's ring used to measure the length of the year.
[In-Depth Description]

Stonehenge

[M/L | t/t+ | ★★★★]
Static model of site; can be used with light source to simulate a mid-summer's morning.
[In-Depth Description]

Tycho Brahe's Sextant

[L | t+ | —]
Scale replica of Brahe's instrument.

Astrolabe Model

[M | t | —]
Device to locate planets in heavens; large scale reproduction of mediaeval instrument.

Eudoxos Hipoped Machine

[L | t | ★★★]
Electrically driven machine to represent retrograde planetary motion according to Aristotle's theory of concentric spheres.
[In-Depth Description]

Ptolemaic Epicycle Machine

[L | t | —]
Driven model of Earth and Jupiter's motion based on Ptolemy's epicycle theory.
[In-Depth Description]

Armillary Sphere

[M/L | t/t | ★★★]
Model to show celestial sphere; larger version has capacity to show lunar motions.
[In-Depth Description]

Copernican Orrery

[L | t | —]
Driven model of Earth-planet system based on Copernican theories for retrograde motion.

Shadow Orrery

[L | t+ | —]
Projection of planetary shadows from illuminated Earth illustrates Copernican theory of retrograde motion.

Kepler's Machine

[L | t+ | —]
Working model to show Kepler's 1st and 2nd laws and the equivalence of the area law to the law of equants.
[In-Depth Description]

Kepler's Universe

[M | t | ★★]
Model of the solar system based on the five perfect solids.
[In-Depth Description]

Contact Us

Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu