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Transit of Venus across the Sun visible from Earth in 1639

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  • passage de Vénus le 4 décembre 1639 entre la Terre et le Soleil (fr)
  • 1639年12月4日に見られた金星の太陽面通過 (ja)
  • transit of Venus across the Sun visible from Earth in 1639 (en)
  • Himmelsphänomen: Vorbeiziehen des Planeten Venus vor der Sonne, 1693 (de)
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  • #FFFFF0 (en)
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  • Thy return posterity shall witness; years must roll away, but then at length the splendid sight again shall greet our distant children's eyes. (Jeremiah Horrocks) (en)
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  • true (en)
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  • center (en)
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  • Jeremiah Horrocks (en)
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  • "Venus in Sole Visa" (en)
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  • When the time of the observation approached, I retired to my apartment, and having closed the windows against the light, I directed my telescope, previously adjusted to a focus, through the aperture towards the Sun and received his rays at right angles upon the paper ... I watched carefully on the 24th from sunrise to nine o'clock, and from a little before ten until noon, and at one in the afternoon, being called away in the intervals by business of the highest importance which, for these ornamental pursuits, I could not with propriety neglect ... About fifteen minutes past three in the afternoon, when I was again at liberty to continue my labours, the clouds, as if by divine interposition, were entirely dispersed ... I then beheld a most agreeable spectacle, the object of my sanguine wishes, a spot of unusual magnitude and of a perfectly circular shape, which had already fully entered upon the Sun's disk on the left ... Not doubting that this was really the shadow of the planet, I immediately applied myself sedulously to observe it ... although Venus continued on the disk for several hours, she was not visible to me longer than half-an-hour, on account of [the Sun] so quickly setting ... The inclination was the only point upon which I failed to attain the utmost precision; for, owing to the rapid motion of the Sun, it was difficult to observe with certainty to a single degree ... But all the rest is sufficiently accurate, and as exact as I could desire. (en)
  • The chance of a clouded atmosphere caused me much anxiety; for Jupiter and Mercury were in conjunction with the Sun almost at the same time as Venus. This remarkable assemblage of the planets , seemed to forebode great severity of weather. Mercury, whose conjunction with the Sun is invariably attended with storm and tempest, was especially to be feared. In this apprehension I coincide with the opinion of the astrologers, because it is confirmed by experience; but in other respects I cannot help despising their more puerile vanities. (en)
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  • 20 (xsd:integer)
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  • 1639 transit of Venus (en)
  • Transit de Vénus de 1639 (fr)
  • 1639年金星凌日 (zh)
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