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National Naval Aviation Museum
Arrayed around the re-creation of a squalid cell in the infamous Hoa Lo Prison, the Vietnam POW exhibit traces the experience of those in captivity from shoot down to homecoming. The American POW experience in Southeast Asia lasted until 1973, when 591 individuals returned home as part of Operation Homecoming. Using photographs and rare artifacts, this exhibit tells the story of that harrowing time, portraying both the hardships of captivity and the joyous return home. Its centerpiece is a re-creation of a cell in the infamous Hoa Lo prison, nicknamed the "Hanoi Hilton" by those held captive there. Flanking the cell is a vivid collection of personal items, including the shell of the flight helmet U.S. Senator John S. McCain, III, wore when he was shot down in 1967, the pajama type uniforms worn by POWs while in captivity, and a book containing sketches of houses that Lieutenant Junior Grade Dan Glenn, an architecture major in college, drew to pass the time in the latter stages of captivity.
I found this cluster of roses on my backyard.. Couldn't believe at first with what I saw as they were arranged so beautifully, naturally..
I took this picture at dusk time, trying to capture both of the roses and background colours. No flash is used either. As a result, the colours look natural, bright and sharp.
A good experiment :)
My dad came to visit. We grabbed his little four-wheeler Geo tracker and headed out some forest service roads to take the back way to the VLA. Weird place.
The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon. Although the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration.
Socorro, New Mexico
The Karl G. Jansky radio telescope installation known as the Very Large Array located just outside Socorro, New Mexico. Each of the 27 dishes (plus 1 spare) is 82 feet in diameter and weighs in at 230 tons. They can be placed in 4 different "Y" configurations ranging from a half a mile apart to just over 22.5 miles and are changed several times a year.