Page 590 Of “Science And Literature In The Middle Ages And The Renaissance” (1878)

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Saint-Sauves-d'Auvergne via Armand Guillaumin

Rue Mosnier decorated with Flags by Edouard Manet

Medium: oil on canvas

November 14, 1969 – Thirty-six-and-a-half seconds after the launch of Apollo 12, the space vehicle triggered a lightning discharge through itself and down to the earth through the Saturn’s ionized plume. Protective circuits on the fuel cells in the Service Module falsely detected overloads and took all the fuel cells offline, as well as much of the Command/Service Module instrumentation. At 52 seconds after liftoff, a second strike knocked out the “8-ball” attitude indicator. The telemetry stream at Mission Control was garble, but Apollo 12 continued to fly correctly. The strikes had not affected the Saturn V rocket’s Instrument Unit.

000:09:02 Conrad (onboard): I think we got hit by lightning.

000:09:04 Gordon Bean (onboard): I do, too.

000:09:06 Gordon (onboard): Something took care of those panels, I’ll say that for it.

Pete Conrad from the 1969 technical debrief: “Because I could see outside, I made the comment to them several times. I told the ground that I thought we had been hit by lightning. I was the only one that had any outside indications. Dick didn’t note anything over his little hole in his center window. I was the only one who noticed anything and that was only the first time. I was aware that something external to the spacecraft had happened. I had the decided impression that I not only saw it, but felt it and heard it.”

Alan Bean from the 1969 technical debrief: “I knew we had power, so I didn’t want to make any changes. I figured we could fly into orbit just like that and that’s exactly what we did. The ground came up a little later and said to put the fuel cells back on the line. I was a little hesitant about doing that, because I didn’t understand that we had been hit by lightning. I gave it a go and, sure enough, things started working very well after that.”

(NASA/Wikipedia/NASA)

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Four Dancers by Edgar Degas

Medium: pastel

Nice

This shows a valid method for computing square roots without using a calculator, and can be used to solve this question. This document was written by Prof. Jeff Forshaw

2017 January 14

Stardust in the Perseus Molecular Cloud Image Credit & Copyright: Lorand Fenyes

Explanation: Clouds of stardust drift through this deep skyscape. The cosmic scene spans nearly 2 degrees across the Perseus molecular cloud some 850 light-years away. A triangle of dusty nebulae reflecting light from embedded stars is captured in the telescopic field of view. With a characteristic bluish color reflection nebula NGC 1333 is at left, vdB13 at bottom right, and rare yellowish reflection nebula vdB12 lies at the top. Stars are forming in the Perseus molecular cloud, though most are obscured at visible wavelengths by the pervasive dust. Still, hints of contrasting red emission from Herbig-Haro objects, the jets and shocked glowing gas emanating from recently formed stars, are evident in NGC 1333. At the estimated distance of the molecular cloud, legs of the triangle formed by the reflection nebulae would be about 20 light-years long.

∞ Source: apod.nasa.gov/apod/ap170114.html

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83.10Ct Natural Australian Queensland Yowah Koroit Boulder Opal

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Ancient Buddha statue emerges in E. China reservoir

Archaeologists have started an underwater detection project after villagers in eastern China’s Jiangxi Province found the head of a Buddha statue emerging from the surface of a local reservoir.

The head was spotted at Hongmen Reservoir, Nancheng County in the city of Fuzhou, at the end of last year when a hydropower gate renovation project lowered water levels in the reservoir by more than 10 meters.

Judging from the head design, the statue was carved during the Ming Dynasty (1368-1644), said Xu Changqing, head of the provincial research institute of archaeology.

He said that the researchers had also found rectangular holes carved on the cliff, obvious marks of architecture, which meant that a temple could have existed there. Read more.