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              Thomas Gaunt Observation Of A Dark Object On 4 Day Old Moon


"Occultation of Jupiter by the moon, on the 24th of May, 1860, by Thomas Gaunt, Esq. 'I send you the following account as seen by me at Stoke Newington. The observation was made with an achromatic of 3.3 inches aperture, 50 inches focus; the immersion with a power of 50, and the emersion with a power of 70. At the immersion I could not see the dark limb of the moon until the planet appeared to touch it, and then only to the extent of the diameter of the planet; but what I was most struck with was the appearance on the moon as it passed over the planet. It appeared as though the planet was a dark object, and glided on to the moon instead of behind it; and the appearance continued until the planet was hid, when I suddenly lost the dark limb of the moon altogether."
http://www.sacred-texts.com/earth/za/za63.htm

My interpretation.
As Jupiter is occulted, during daylight hours, by the approx 4 day old Moon a dark object passes in front of the non visible (blue) part of the Moon. As Jupiter moves behind the Moon's non core area, the planet's gravitational field passes through the Moon. In doing so it's field properties are altered. Instead of adding to, or complementing the Earth's local light
generation, it disturbs it. The result is a negative image of the planet appearing in the ionosphere, creating the impression or illusion that Jupiter is passing in front of the Moon. As Jupiter reaches the core area of the Moon, its effect is completely blocked or nullified, and there is no further disturbance.

This is similar to the Total Eclipse of the Sun by the Moon's core. The Black Disk or Umbra we see then is a local complete disturbance of Earth's atmospheric light generating ability. Our Penumbra is caused by the Sun's gravitational field passing through the non core area of the Moon, and being  disturbed to the extent that it creates minimal light.

It would appear that Jupiter, and probably other planets, will cause a light generating disturbance if occulted during the day.

The implication here is that Jupiter may have some small effect on the generation of the blue light in our sky.



A simulation of the occultation of Jupiter by the Moon on 24th May 1860 as seen from London UK. This is daylight, but the atmosphere has been removed by the Stellarium program. The names "Moon" and "Jupiter" have merged as the planet passes behind the Moon.
A view of the visible part of the Moon during the occultation. As above, the atmosphere has been removed.