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    Google Homepage ~ May 17, 2017

    Antikythera mechanism
    Generally referred to as the first known analogue computer,[26] the quality and complexity of the mechanism's manufacture suggests it has undiscovered predecessors made during the Hellenistic period. Its construction relied upon theories of astronomy and mathematics developed by Greek astronomers, and is estimated to have been created around the late second century BCE. In 1974, Derek de Solla Price concluded from gear settings and inscriptions on the mechanism's faces that it was made about 87 BC and lost only a few years later. Jacques Cousteau and associates visited the wreck in 1976 and recovered coins dated to between 76 and 67 BC.

    A schematic representation of the gearing of the Antikythera Mechanism, including the 2012 published interpretation of existing gearing, gearing added to complete known functions, and proposed gearing to accomplish additional functions, namely true sun pointer and pointers for the five then-known planets, as proposed by Freeth and Jones, 2012. Based also upon similar drawing in the Freeth 2006 Supplement and Wright 2005, Epicycles Part 2. Proposed (as opposed to known from the artefact) gearing crosshatched.

    This reminds me of bicycle gearing, both internal planetary hubs and external derailleurs and gears. You can see were I might get my celestial mechanical fascination from, in relation to bicycles. Fascinating in deed!

    The waning crescent Moon hangs low with Venus and Mercury at dawn.
    (The visibility of Mercury is exaggerated here; binoculars will help.)

    Monday, May 22,2017

    Look east in early dawn Tuesday morning for Venus with the waning crescent Moon, as shown above. And can you make out Mercury yet? (In these scenes, the Moon is always shown three times its actual apparent size.)
    New Moon is on Thursday, May 25th, 2017. This is another lunar cycle closer to the Great Solar Eclipse of August 21st, 2017. The alignment between Sun and New Moon is getting tighter and tighter with each successive cycle, with three cycles to go. Let's hope for clear skies. (see above posting of April 2nd, 2017)