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  2. 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 ...

  3. Landscape photography - Wikipedia

    en.wikipedia.org/wiki/Landscape_photography

    Landscape photography (often shortened to landscape photos) shows the spaces within the world, sometimes vast and unending, but other times microscopic. Landscape photographs typically capture the presence of nature but can also focus on human-made features or disturbances of landscapes.

  4. 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.

  5. Star trail - Wikipedia

    en.wikipedia.org/wiki/Star_trail

    The term is used for similar photos captured elsewhere, such as on board the International Space Station and on Mars. [2] [3] Typical shutter speeds for a star trail range from 15 minutes to several hours, requiring a "Bulb" setting on the camera to open the shutter for a period longer than usual. However, a more practiced technique is to blend ...

  6. NASA's before and after images show Earth's changing ... - AOL

    www.aol.com/news/nasas-images-show-earths...

    The Images of Change project provides side-by-side photos of the same place over time to document the environment changes caused by nature and man. NASA's before and after images show Earth's ...

  7. NASA image of Earth reignites North Pole is hollow conspiracy

    www.aol.com/news/2016-05-23-nasa-image-of-earth...

    NASA's new pictures of Earth are reigniting conspiracy theories straight out of "Journey to the Center of the Earth." ... That's not exactly true, since planes fly within a few dozen miles of the ...

  8. Shutter (photography) - Wikipedia

    en.wikipedia.org/wiki/Shutter_(photography)

    A central shutter is not a type of shutter as such, but describes the position of the shutter: it is typically a leaf shutter (or simple leaf shutter), and located within the lens assembly where a relatively small opening allows light to cover the entire image. Leaf shutters can also be located behind, but near, the lens, allowing lens ...

  9. How long it really takes to fall through the Earth - AOL

    www.aol.com/news/long-really-takes-fall-earth...

    The original calculations assumed that the Earth has the same density throughout - and the gravitational force changes as you approach the center, much like the weight of a spring that bounces up ...