The postcard star clock
A few cuts and some glue - and this postcard is transformed into a small, fine sundial that shows the time using the pole star and the Big Dipper. With a height of only one millimetre, this is probably the flattest clock in the world and, apart from our sundial postcard, also the only one that can be sent by post with only a stamp attached.
- Dimensions of the built model:12.3 x 7.8 cm
- Difficulty and time expenditure low
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Astromedia
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