Space debris

Space/orbital debris/junk/waste is the collection of defunct man-made objects in space – old satellites, spent rocket stages, and fragments from disintegration, erosion, and collisions – including those caused by debris itself.

As of July 2013, there are over 170 million debris smaller than 1 cm (0.4 in). From one to ten cm at ~670,000, larger debris at 29,000.As of 2009, 19,000 debris over 5 cm (2 in) are tracked. Below 2000 km debris are denser than meteoroids; mostly dust from solid rocket motors, surface erosion debris like paint flakes, and frozen coolant from RORSAT nuclear-powered satellites. They cause damage akin to sandblasting, especially to solar panels and optics like telescopes or star trackers that can not be covered with a ballistic Whipple shield (unless it is transparent).

For comparison, the International Space Station orbits in the 300–400 kilometres (190–250 mi) range and the 2009 satellite collision and 2007 antisat test occurred at 800 to 900 kilometres (500 to 560 mi). The ISS has Whipple shielding, however known debris with a collision chance over 1/10000 are avoided by maneuvering the spacecraft.

Mavis Beacon Teaches Typing

Mavis Beacon Teaches Typing is an application software program for teaching touch typing.

History

The typing program was initially released in late 1987 by The Software Toolworks and has been published regularly ever since. The original version was written for MSDOS by Norm Worthington, Walt Bilofsky and Mike Duffy. Editions of Mavis Beacon are currently published by Encore Software (hybrid Mac and Windows) and Software MacKiev (Mac OS X only) and are available throughout the retail sales world. An early version supported both QWERTY and the alternative Dvorak Simplified Keyboard layout. Later versions supported only QWERTY until the 2011 Ultimate Mac Edition from Software MacKiev which returned full Dvorak keyboard lessons to the product. Earlier versions were made for Apple II, Commodore 64, Atari 400/800 (version 1 only), Apple IIGS, Atari ST, Mac OS, Windows, Palm OS (version 16), and Amiga systems. The current Windows and Mac versions are published under the Brøderbund trademark by both Encore and Software MacKiev.

Space Junk (disambiguation)

Space Junk may refer to a:

Songs

  • "Space Junk" (Devo song), a song by Devo
  • "Space Junk" (Wang Chung song), a song by the band Wang Chung
  • Other

  • Space debris, also known as "space junk"
  • Space Junk Galaxy, a galaxy from the video game Super Mario Galaxy
  • See also

  • Space (disambiguation)
  • Junk (disambiguation)
  • Podcasts:

    PLAYLIST TIME:

    Space Junk

    by: Wang Chung

    Yeah
    Drifting on the space-way
    By the Betelgeuse Hotel
    Mapping out constellations
    Of the place I know so well
    Sifting through the system
    For the piece that knows my name
    Endlessly I listen
    In the master game
    Welcome to my world
    (Welcome to my world)
    Welcome to my only world
    (Welcome to my only world)
    It is full of space junk
    But your words are coming through
    I'm riding on the space junk
    And it's bringing me to you
    Bringing me to you
    Through the tenth dimension
    To the certainties beyond
    Dreamily in attention
    And the sub-atomic bomb
    Machine that spins within me
    And the spirit that drives me on
    Searching for an answer
    Welcome to my world
    (Welcome to my world)
    Welcome to my only world
    (Welcome to my only world)
    My head is full of space junk
    But your words are getting through
    I'm riding on the space junk
    And it's bringing me to you
    Bringing me to you, yeah
    It's bringing me to you, yeah, yeah oh
    Sitting on the space junk
    What am I to do?
    I'm riding on the space junk
    And it's bringing me to you
    My head is full of space junk
    But your words are getting through
    I'm riding on the space junk
    And it's bringing me to you
    It's bringing me to you
    It's bringing me to you




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