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ISON

15-08-13 01:59:24 - Quote! - @heraux
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Sterren aan de hemel - Soms helder en soms vaag

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Tussen 5 juni en 29 augustus 2013 zal de komeet een elongatie hebben van minder dan 30 graden van de zon.[9] De Spitzer Space Telescope zal de komeet mogelijk kunnen waarnemen op 13 juni. Rond september 2013 wordt de komeet naar verwachting zichtbaar met kleine telescopen of een verrekijker.[2][8] Rond 6 november 2013 wordt de komeet naar verwachting helder genoeg om ook met het blote oog te zien. Dit zal tot januari 2014 duren.[2][8]


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15-08-13 02:25:03 - Quote! - @heraux
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Winstanley

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Winstanley was recorded as having expressed great faith in his construction, going so far as to wish that he might be inside it during “the greatest storm there ever was“. He got his wish. The tower was entirely destroyed on the night of 27 November 1703, during the Great Storm of that year. Winstanley was visiting the lighthouse that night to make repairs, and he lost his life.

15-08-13 02:30:11 - Quote! - @heraux
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John Smeaton

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Employing his skills as a mechanical engineer, he devised a water engine for the Royal Botanic Gardens at Kew in 1761 and a watermill at Alston, Cumbria in 1767 (he is credited by some for inventing the cast iron axle shaft for waterwheels). In 1782 he built the Chimney Mill at Spital Tongues in Newcastle upon Tyne, the first 5-sailed smock mill in Britain. He also improved Thomas Newcomen's atmospheric engine, erecting one at Chacewater mine, Wheal Busy, in Cornwall in 1775.
In 1789 Smeaton applied an idea by Denis Papin, by using a force pump to maintain the pressure and fresh air inside a diving bell.[7][8] This bell, built for the Hexham bridge project, was not intended for underwater work, but in 1790 the design was updated to enable it to be used underwater on the breakwater at Ramsgate Harbour.[8] Smeaton is also accredited for explaining the fundamental differences and benefits of Overshot Water wheels versus Undershot Water wheels.
Smeaton experimented with the Newcomen steam engine and made significant improvements around the time James Watt was building his first engines (ca. late 1770s).[9]


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