The Story of the HeavensBall, Robert S. (Robert Stawell)
History
The Story of the Heavens
Ball, Robert S. (Robert Stawell)
Astronomy
But better things were in store. My assistant came over with the report
that he had also been successful in seeing Venus in the same phase as I
had. We both resumed our posts, and at half-past two the clouds began to
disperse, and the prospect of seeing the sun began to improve. It was
now no question of the observations of contact. Venus by this time was
well on the sun, and we therefore prepared to make observations with the
micrometer attached to the eye-piece. The clouds at length dispersed,
and at this time Venus had so completely entered on the sun that the
distance from the edge of the planet to the edge of the sun was about
twice the diameter of the planet. We measured the distance of the inner
edge of Venus from the nearest limb of the sun. These observations were
repeated as frequently as possible, but it should be added that they
were only made with very considerable difficulty. The sun was now very
low, and the edges of the sun and of Venus were by no means of that
steady character which is suitable for micrometrical measurement. The
margin of the luminary was quivering, and Venus, though no doubt it was
sometimes circular, was very often distorted to such a degree as to make
the measures very uncertain.
We succeeded in obtaining sixteen measures altogether; but the sun was
now getting low, the clouds began again to interfere, and we saw that
the pursuit of the transit must be left to the thousands of astronomers
in happier climes who had been eagerly awaiting it. But before the
phenomena had ceased I spared a few minutes from the somewhat mechanical
work at the micrometer to take a view of the transit in the more
picturesque form which the large field of the finder presented. The sun
was already beginning to put on the ruddy hues of sunset, and there, far
in on its face, was the sharp, round, black disc of Venus. It was then
easy to sympathise with the supreme joy of Horrocks, when, in 1639, he
for the first time witnessed this spectacle. The intrinsic interest of
the phenomenon, its rarity, the fulfilment of the prediction, the noble
problem which the transit of Venus helps us to solve, are all present to
our thoughts when we look at this pleasing picture, a repetition of
which will not occur again until the flowers are blooming in the June of
A.D. 2004.
Public-domain text, read in full here on John Shaqi.
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