Monday 14 November 2016

A Foggy Night on the Coast



2 images taken from our Backyard last night with a hand held Canon Compact Camera
It was quite foggy in Lowestoft last night and so the Super Moon, so called when our Moon, following its elliptical path around the centre of gravity of the Earth- Moon dynamic system, is at its closest (or perigee), was wrapped in a cloak of soft pastel blue and pink fur.

The last time the Moon appeared as large as this month's Super Moon, 69 years ago, I was but a twinkle in my late father's eye.  If I live to be 85 years old I might manage to see the Moon looking as big again on the 25th of November 2034 !

In meteorology, a corona (plural coronae) is an optical phenomenon produced by the diffraction of light from the Sun or the Moon (or, occasionally, bright stars or planets) by individual small water droplets and sometimes tiny ice crystals of a cloud or on a foggy glass surface. In its full form, a corona consists of several concentric, pastel-colored rings around the celestial object and a central bright area called aureole. The aureole is often (especially in case of the Moon) the only visible part of the corona and has the appearance of a bluish-white disk which fades to reddish-brown towards the edge. The angular size of a corona depends on the diameters of the water droplets involved: Smaller droplets produce larger coronae. For the same reason, the corona is the most pronounced when the size of the droplets is most uniform. Coronae differ from halos in that the latter are formed by refraction (rather than diffraction) from comparatively large rather than small ice crystals. - credit for italic text - Wikipedia

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