Visit –> http://ift.tt/2ipwqHB to read ‘Gestalt Theory’ by Max Wertheimer in full for free! A classic text in the history of Gestalt Psychology.
16 dezembro 2017
The Einstein Cross Gravitational Lens
Most galaxies have a single nucleus -- does this galaxy have four? The strange answer leads astronomers to conclude that the nucleus of the surrounding galaxy is not even visible in this image. The central cloverleaf is rather light emitted from a background quasar. The gravitational field of the visible foreground galaxy breaks light from this distant quasar into four distinct images. The quasar must be properly aligned behind the center of a massive galaxy for a mirage like this to be evident. The general effect is known as gravitational lensing, and this specific case is known as the Einstein Cross. Stranger still, the images of the Einstein Cross vary in relative brightness, enhanced occasionally by the additional gravitational microlensing effect of specific stars in the foreground galaxy.
from NASA http://ift.tt/2j8dLNf
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sadekettu: jumpingjacktrash: historical-nonfiction: About...
About 2,000 years ago, a Roman politician celebrated his victory by commissioning a sundial and putting it in public so everyone could read his name each time they checked the time. On the base of the sundial is inscribed “M(arcus) NOVIUS M(arci) F(ilius) TUBULA” — or Marcus Novius Tubula, son of Marcus. Another engraving on the rim of the bowl says that Tubula (literally, “small trumpet”) held the office of “TR(ibunus) PL(ebis)” — that is, plebeian tribune, and paid for the sundial “D(e) S(ua) PEC(unia),” or “with his own money.”
The sundial was found in the town of what was then Lirenas, about 90 miles southeast of Rome. The style of the letters suggests to researchers that the sundial was erected in the mid-first century BCE or onward.
were these standard abbreviations, or did the stonecutter just not know how to write small? :D
I’m thinking standard. Romans had standard abbreviations for several names and were weirdly bureaucratic. And that’s all I remember from Latin class.
This beautiful piece was carved by hand from camel bone!...
This beautiful piece was carved by hand from camel bone! Depicting Kwanyin Mountain, it contains about 27 hand-carved Taoist immortals, flowers, clouds, and a central pagoda. Chinese, 1800s.
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