I liked this particular "astronomy picture of the day" because of its incredible historical connection. the "Antikythera Mechanism" was found in an ancient Greek ship at the bottom of the sea, which most likely sank around 80 BC. Such a gear was not thought to have been created for another 1,000 years later- it was a sort of mechanical computer. The wheels and gears create a sort of orrery of the sky; although some of its functions are unknown, one use was probably to predict events such as eclipses. It is about the size of a large book.
- Moon (silver)
- Mercury (turquoise)
- Venus (lapis lazuli)
- Sun (gold)
- Mars (red onyx)
- Jupiter (white crystal)
- Saturn (obsidian).
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