The Stardial - AstroMedia
Pre-cut cardboard kit for a Nocturnal, which allows you to tell the time at night using the starry sky. Includes a sailor's astrolabe on the back.
Not groping in the darkHow did people in earlier times tell the time at night? This reconstruction of the Stardial invented about 500 years ago makes use of the fact that the constellation Big Dipper orbits Polaris once in 23 hours and 56 minutes, as if it were the hand on a giant clock. Because of the difference of 4 minutes compared to a whole day, the sidereal clock is set to the current date before reading, then it shows the True Local Time with amazing accuracy. You can even feel it with your fingertips in the dark.
On the back of the large sundial is a sailor's astrolabe for determining the altitude of the sun, stars and landmarks.
How it works
Turn the date disc until the day's date is in the reading window of the handle above the arrow mark. Find the constellation Big Dipper and from there the North Star. Hold the star clock by the handle so that it points vertically downwards and, with your arm half bent, take a bearing on Polaris through the hole in the axle. Turn the star pointer until its straight edge is parallel to the two rear stars of the carriage. The Big Dipper on the star clock is now positioned like the one in the sky. Read the True Local Time in the reading window of the star hand or feel the time using the long and short prongs of the hour disc.Small star clock
In addition, we offer a star clock in postcard format - 283.PKUas well as a simple star clock to cut out - 103.STU
| Aspiration scale: | Medium |
|---|---|
| Time Line: | 0,5 Hour |
sturdy kit made of die-cut cardboard and with noble gold print
Size of the built article:
total: 21 x 23 cm (Ø of the disc: 16 cm, plus 5-7 cm handle)
Construction time: about 4 hours
Distributor:
PGI-Skarabäus, Im Kränzliacker 9, 79576 Weil am Rhein, Germany, pgi-shop.de
PGI-Skarabäus, Lerchenstrasse 38, 4147 Aesch, Switzerland, pgi-shop.ch
Manufacturer: AstroMedia GmbH, Im Wirrigen 30, 45731 Waltrop, Germany, astromedia.de
Adult supervision:
Children under 14 years of age should only use the kit under adult supervision to avoid risks from improper handling.
Risk of injury:
Be particularly careful when handling pointed and sharp parts! Use sharp tools carefully, if necessary take appropriate safety measures to avoid injuries.
Fire hazard:
Keep away from open fire and heat sources. Model is made of highly flammable materials.
Use of glue:
When using glue, follow the manufacturer's safety instructions. Work in well-ventilated rooms and avoid skin or eye contact.
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