The Moon Clock

This Clock Shows the Phases of the Moon!

Like the Moon, this astronomical clock moves very slowly. It takes 29 days, 12 hours and 44 minutes for the moon sphere to show all its phases, which is exactly the average time from one New Moon to the next.

How is that possible?

Inside the Moon Clock, a half-white, half-black sphere turns very slowly, driven by a special battery powered mechanism so that it continuously displays the current phase of the Moon. It does this minute to minute, from the first delicate Crescent Moon, to the waxing Half Moon, to the Full Moon, and then back to the New Moon. The representation of the phases is as accurate as the Moon itself, because the always half illuminated Moon behaves the same way in its interaction with the Sun.

Assembling this cardboard kit is straightforward and quickly produces a very elegant result.

This kit contains:

3 pre-cut and printed A4 sheets of construction cardboard
1 printed A4 sheet of construction cardboard for cutting out
1 special clock movement, 56 x 56 x 16 mm, rotation in 29.53 days, incl. washer (metal), rubber washer and nut (metal)
2 EVA hemispheres, Ø 40 mm x 20 mm, 1 black and 1 white (moon hemispheres)
3 wooden toothpicks, Ø 2 mm x 80 mm (extension of the moon shaft)
1 cardboard drinking straw, Ø 6 mm x 140 mm (reducing sleeve)

Detailed assembly instructions

Not included: 1 AA battery

Features: 1 rotation in 29 days, 12 hours and 44 minutes

Dimensions of the built item: approx. 12 x 7.5 x 14.5 cm

Construction time: approx. 4 hours