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Ok, thanks BobbyO, I will then. One Moon mystery coming up Please pay special attention to the bolded words of this astronomer's report. On the surface this looks like an easy mystery to solve......BUT IT ISN'T!: I will give some backstory on this report later. Enjoy : "During the daylight hours, when I was at work with the spectroscope, Mr. Hirst employed some of his time in looking up Venus near the sun, and many other objects, principally well known double stars; and of these some splendid views were obtained, but he found nothing about which 1 wish now to detain you, until the morning of the 21st (October), at 9hr,. 5m., when, on looking at the moon, he found that a large part of it was covered with a dark shade, quite as dark as the shadow of the earth during an eclipse of the moon. Its outline was generally circular, and it seemed to be fainter near its edges. Conspicuous bright spots on the moon could be seen through it, but it quite obliterated the view of about half of the moon's terminator (or that part where the sunlight ends), while those parts of the terminator not in the shadow could be very distinctly seen. I should estimate the diameter of the shadow from the part we could see on the moon at about three-fourths that of the moon. This is one of those remarkable facts which, being seen, should be recorded, although no explanation can at present be offered. One can hardly resist the conviction that it was a shadow, yet it could not be the shadow of any known body, and if produced by a comet it must be one of more than ordinary density, although dark bodies have been seen crossing the sun, which were doubtless comets. No change in the position of the shade could be detected after three hours' watching. Mr. Hirst has faithfully copied on this paper what he saw."

H, who cares..;) Just post. Here's some graphics, if anything doesn't make sense, just shout and i'll explain.