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Updated: May 3, 2025
They take place, accordingly, when the star is at the furthest point from ourselves of an orbit described round an invisible companion, the transits of which across its disc betray themselves to notice by the luminous vicissitudes they occasion.
Having finally selected her, this idle spectator studied her as well as he was able during each of her brief transits across his visual field. She was absolutely unconscious of everything save the act of riding: her features were rapt in an ecstatic dreaminess; for the moment she did not know her age or her history or her lineaments, much less her troubles.
In 1862 Lockyer established a "marvellous agreement" with Beer and Mädler's results of 1830, leaving no doubt as to the complete fixity of the main features, amid "daily, nay, hourly," variations of detail through transits of clouds.
Meantime, young Meltham was pretty frequent in his visits to the house or transits past it; and, judging by Matilda's execrations and reproaches, her sister paid more attention to him than civility required; in other words, she carried on as animated a flirtation as the presence of her parents would admit. She made some attempts to bring Mr.
If Venus were as much flattened at the poles as the earth is, it would seem that the fact could not escape detection, yet the necessary observations are very difficult, and Venus is so brilliant that her light increases the difficulty, while her transits across the sun, when she can be seen as a round black disk, are very rare phenomena, the latest having occurred in 1874 and 1882, and the next not being due until 2004.
That stars should vary in their intensity of light by the probable transits of these dark cosmical bodies across their discs, is no matter of wonder or astonishment: on the contrary, it is surprising that these sidereal phenomena do not occur with much greater frequency.
Lunar transits were taken at the river Du Loup, and distances of the moon for longitude at several places on the line. The reliance for the longitudes was, however, principally upon timekeepers, and of these the party was furnished with one box and two pocket chronometers by Parkinson & Trodsham, one pocket chronometer by Molyneux, one by French, one by Barraud, and one by Morrice.
As the progress of such events is always gradual, industry from its nature being opposed to sudden transits, let us suppose that, without waiting the extreme point, it will have gradually divided itself between A and B, according to the laws of supply and demand; that is to say, according to the laws of justice and usefulness.
Many important facts have been learned by watching these transits. Mercury also has transits across the sun, but as she is so much smaller than Venus they are not of such great importance. It was by the close observation of Venus during her transits that the distance from the earth to the sun was first measured. Not until the year 2004 will another transit of Venus occur.
A similar appearance is observed during transits of Venus, when she passes directly between us and the actual solar disk. A silver thread is then seen encircling that side of the planet which has not yet entered on the face of the sun or "a shadowy nebulous ring," as it was described by Mr. Macdonnell at Eden, surrounds the whole planetary disk when two-thirds of it have passed the solar edge.
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