The star clock (Nocturnal) - AstroMedia
Product number:
103.STU
The star clock, also called a "nocturnal", is a timepiece invented in the Renaissance.
Using the North Star and the Big Dipper to tell the time
With the help of the sidereal clock, the local time (= solar time) can be read at night from the position of the constellation Big Dipper in relation to the pole star. The device consists of two rotating discs, one above the other, with a pointer and a hole in the middle. The date is set on the lower disc. Then the pole star is aimed through the hole and at the same time the pointer is set to the pole pointer of the Big Dipper. In this way, the time can be read on the upper disc. If it is too dark, you can even find the time by feeling it with your fingertips.
For teachers and pupils
The star clock is easy to build and is an excellent teaching aid for secondary schools. Like all other astro materials, it can also be used for other group and project work on astronomy and physics.
| Aspiration scale: | Easy |
|---|---|
| Time Line: | 0,5 Hour |
Product information "The star clock (Nocturnal) - AstroMedia"
Cut-out cardboard sheets, printed
for assembly, DIN A4
with detailed assembly instructions
Dimensions of the finished article: Ø of the disc 13 cm, plus handles
This is what you need for the assembly
> a firm, flat work surface
> a sharp cutter knife, e.g. craft knife
> a good all-purpose glue, e.g. craft glue
> some fine sandpaper, e.g. sand sheet craft file
> scissors
Quantity
Unit price
To
10
€1.50
To
25
€1.43
-5 %
To
100
€1.35
-10 %
From
101
€1.28
-15 %