Products

The TRAPPIST-1 orrery is the first high accuracy exoplanet orrery for another star in our galaxy. TRAPPIST-1 is an ultracool red M-dwarf star located within the constellation Aquarius, about five degrees south of the celestial equator. This star has received a lot of attention because a few of the seven planets are in the "habitable zone" and might have a chance to support life. One turn of the TRAPPIST-1 orrery input crank represents twelve hours of Earth time. The pointer on the time dial turns once for every two turns of the input.

This is a working reproduction of an Orrery built in 1750 by the Scottish astronomer James Ferguson. This is called the mechanical paradox orrery because the gear train is of an unusual design that illustrates the counter-rotating motions of the Moon's nodes and the apogee of it's orbit.

This is a miniature handheld orrery that displays the motions of Mercury, Venus, Earth, and Mars in correct relative velocities around the Sun. Designed to be demonstrated by hand, the orrery is about 4 inches across and is operated by a knob in the base.

This is a modern interpretation of teaching devices created to illustrate the movement of objects in an elliptical orbit. When first created in the 18th and 19th centuries, comets were a new and fascinating topic. These devices illustrate how comets sweep out equal areas in equal time intervals. Driven by a hand crank, the movement of the comet arm varies by position in orbit, moving faster closer to the Sun than when farther away.

This is a desktop model of the 22 currently known stars within 12 light years of our Sun. The model is based on the most recent data available, the most recent being WISE 0855−0714, discovered in 2014.

This is a working gear train demonstrator for James Ferguson's Mechanical Paradox Orrery. It is designed to be shared with a classroom or passed around a lecture audience. The demonstrator lets people experience the differential motion of the gears first-hand by rotating the knob below the base.

This is a museum quality presentation set of John Napier's numbered rods designed for multiplication, division, and the extraction of roots. Made of the finest materials, this will last for generations - carrying Napier's invention along to future generations.

This is a museum quality presentation set of Genaille Lucas calculating rulers designed for multiplication and division. The set contains 23 rulers made of the finest materials, and will last for generations.

This is the ultimate man cave or shop clock, machined from aircraft grade aluminum to give a new level of cool to the bench or desktop.

ThinkWeights are paperweights engraved with important numerical constants, equations, and other things intended start a conversation. ThinkWeights are rotary engraved from aircraft grade aluminum to provide lasting value and a great heirloom to pass along to future generations.

The lever paradox is a deceptively simple mechanism that inspires curiosity prcisely because it does nothing when it looks like it should be doing something.

The legendary HP-01 calculator watch, first introduced in 1977, is highly prized by collectors. This tool is designed to facilitate the most careful removal and replacement of the back cover for changing the battery without risking damage to the case.