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  2. The Blue Marble - Wikipedia

    en.wikipedia.org/wiki/The_Blue_Marble

    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.

  3. Umbra, penumbra and antumbra - Wikipedia

    en.wikipedia.org/wiki/Umbra,_penumbra_and_antumbra

    Umbra, penumbra and antumbra of Earth and images that could be seen at some points in these areas (Note: the relative size and distance of the bodies shown are not to scale.)“… The Earth’s shadow has two distinct parts,… the UMBRA is the part of the shadow where all direct sunlight is blocked by the Earth; the PENUMBRA of the shadow is ...

  4. Diatomaceous earth - Wikipedia

    en.wikipedia.org/wiki/Diatomaceous_earth

    Diatomite rock sample from Sisquoc Formation Scanning electron micrograph of diatomaceous earth. Diatomaceous earth (/ ˌ d aɪ. ə t ə ˈ m eɪ ʃ ə s / DY-ə-tə-MAY-shəs), diatomite (/ d aɪ ˈ æ t ə m aɪ t / dy-AT-ə-myte), celite or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder.

  5. WeChat - Wikipedia

    en.wikipedia.org/wiki/WeChat

    WeChat or Weixin in Chinese (Chinese: 微信; pinyin: Wēixìn (listen ⓘ); lit. 'micro-message') [a] is a Chinese instant messaging, social media, and mobile payment app developed by Tencent.

  6. Kevin Kelly (editor) - Wikipedia

    en.wikipedia.org/wiki/Kevin_Kelly_(editor)

    He was hired in 1983 [4] by Whole Earth founder Stewart Brand to edit some of the later editions of the Whole Earth Catalog, the Whole Earth Review, and Signal. With Brand, Kelly helped found the WELL, an influential virtual community. As director of the Point Foundation, he co-sponsored the first Hackers Conference in 1984. [6]

  7. McDonnell Douglas F-15 Eagle - Wikipedia

    en.wikipedia.org/wiki/McDonnell_Douglas_F-15_Eagle

    The McDonnell Douglas F-15 Eagle is an American twin-engine, all-weather fighter aircraft designed by McDonnell Douglas (now part of Boeing).Following reviews of proposals, the United States Air Force (USAF) selected McDonnell Douglas's design in 1969 to meet the service's need for a dedicated air superiority fighter.

  8. ShareX - Wikipedia

    en.wikipedia.org/wiki/ShareX

    ShareX can be used to capture full screen or partial screenshots (which can be exported into various image formats), such as rectangle capture and window capture. It can also record animated GIF files and video using FFmpeg. An included image editor lets users annotate captured screenshots, or modify them with borders, image effects, watermarks ...

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