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The mirror landing aid was a gyroscopically controlled concave mirror on the port side of the flight deck. On either side of the mirror was a line of green coloured "datum lights". A bright orange "source" light was shone into the mirror creating the "ball" (or "meatball" in later USN parlance) which could be seen by the aviator who was about ...
The Blue Marble is a photograph of Earth taken on December 7, 1972, by either Ron Evans or Harrison Schmitt aboard the Apollo 17 spacecraft on its way to the Moon.Viewed from around 29,400 km (18,300 mi) from Earth's surface, [1] a cropped and rotated version has become one of the most reproduced images in history.
Rear Admiral Hilary Charles Nicholas Goodhart CB FRAeS (28 September 1919 – 9 April 2011) was an engineer and aviator who invented the mirror-sight deck landing system for aircraft carriers. He was also a world champion and record breaker in gliding .
NASA's new pictures of Earth are reigniting conspiracy theories straight out of "Journey to the Center of the Earth." These are previously unreleased images of our blue marble planet, showing the ...
A concave mirror, or converging mirror, has a reflecting surface that is recessed inward (away from the incident light). Concave mirrors reflect light inward to one focal point. They are used to focus light. Unlike convex mirrors, concave mirrors show different image types depending on the distance between the object and the mirror.
A convex secondary mirror is placed just to the side of the light entering the telescope, and positioned afocally so as to send parallel light on to the tertiary. The concave tertiary mirror is positioned exactly twice as far to the side of the entering beam as was the convex secondary, and its own radius of curvature distant from the secondary.
This so-called "sun gun" (Sonnengewehr) would be part of a space station 8,200 kilometres (5,100 mi) above Earth. The scientists calculated that a huge reflector, made of metallic sodium and with an area of 9 square kilometres (900 ha; 3.5 sq mi), could produce enough focused heat to make an ocean boil or burn a city. [ 1 ]
The agency has narrowed its safe landing sights down to nine. NASA identifies 9 possible landing spots for 2026 mission returning humans to the moon Skip to main content