Understanding the workings of the heavens gave the ancient navigatorsan anchor in timefrom which one could calculate an estimated locationon a map.
Many scientists originally thought the Antikythera Mechanism, which is believed to be 2000 years old,was a piece of navigational equipment.
Little did they know it would be one of the most important scientific measuring devices ever discovered. This video describes its shipwreck origins.
The Antikythera Mechanism is the earliest preserved portable astronomical calculator, calculating the Sun, Moon and likely the positions of the inner planets which were known in antiquity. The mechanism was used to predict solar and lunar eclipses.
This video shows how the gear assembly works – fantastic !
Saturn = time
Uranus = machines
Then watch this short, but very cool vid of an annular eclipse, and the moon’s shadow as it crosses the Earth.
antumbra – The antumbra is that part of the Moon’s shadow that extends beyond the umbra. It is similar to the penumbra in that the Sun is only partially blocked by the Moon. From within the antumbra, the Sun appears larger than the Moon which is seen in complete silhouette. An annular eclipse is seen when an observer passes through the antumbra.
penumbra – The penumbra is the weak or pale part of the Moon’s shadow. From within the penumbra, the Sun is only partially blocked by the Moon as in the case of a partial eclipse. This contrasts with the umbra, where the Sun is completely blocked resulting in a total eclipse.
umbra – The umbra is the darkest part of the Moon’s shadow. From within the umbra, the Sun is completely blocked by the Moon as in the case of a total eclipse. This contrasts with the penumbra, where the Sun is only partially blocked resulting in a partial eclipse. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I don’t know if I have mentioned I love, Love, LOVE maps..!
My Mercury lives at Midheaven & Mercury rules maps ! So, I’m tossing this last one in for a great visual of the luminaries and the difference between a lunar and solar eclipse.