Tag Archives: computers

Blinking Astronomical Photographs

Low-Cost Approach to Scanning Historic Glass Plates Yields an Astronomical Surprise. Technical details at Precise Photometric Measurements from a 1903 Photographic Plate Using a Commercial Scanner.

Professional astrophotography used to be done on emulsion-coasted glass places. That was how astromical discoveries were made for nearly a century.

More than an estimated 2.4 million glass plates are out there in collections in North America alone. These were taken starting in the 1890s right up until the 1970s, when CCD (Charged Couple Device) detectors started to come online for astronomy. Of these, only an estimated 400,000 plates have been digitized to research quality

The team in this article has found a much cheaper way to proceed with this process, using off-the-shelf hardware.

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Monday Night Irish Class, February 1, 2016

Irish Class, February 1, 2016

Rang Gaeilge, 1ú lá mí Feabhra 2016

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Fadas: áéíóúÁÉÍÓÚ

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Seanfhocal

Cuireann duine snaidhm lena theanga nach bhfuasclóidh a fhiacla. A person ties a knot with his tongue that his teeth cannot loosen. He gets married.
Beidh lá eile ag an bPaorach. Better luck next time. “Power will have another day” [“Power” is not anyone in particular]
an rud nach binn le duine ní chluineann sé é. The thing that is not sweet [to the ear] is not heard.

Adjectives

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