Astronomy Picture of the Day

                         Astronomy Picture of the Day

    Discover the cosmos! [1] Each day a different image or photograph of our
 fascinating universe is featured, along with a brief explanation written by a
                           professional astronomer.

                                2018 October 7
          You need a more recent version of Adobe Flash Player [2] .
                   The Scale of the Universe - Interactive
            Animation Credit & Copyright: Cary & Michael Huang [3]

Explanation: What does the universe look like on small scales? On large
scales? Humanity [4]  is discovering that the universe is a very different
place on every proportion that has been explore [5] d. For example, so far as
we know, every tiny proton is exactly the same [6] , but every huge galaxy [7]
 is different. On more familiar scales, a small glass table top to a human is
a vast plane [8]  of strange smoothness to a dust mite [9]  -- possibly
speckled [10]  with cell boulders. Not all scale lengths are well explored
[11]  -- what happens to the smallest mist droplets you sneeze, for example,
is a topic of active research -- and possibly useful to know to help stop the
spread [12]  of disease. The featured interactive flash animation [13] , a
modern version [14] of the classic video Powers of Ten [15] , is a new window
to many of the known scales [16]  of our universe. By moving the scroll bar
across the bottom, you can explore a diversity of sizes [17] , while clicking
on different items will bring up descriptive information.

                        Tomorrow's picture: sun dance

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    Authors & editors: Robert Nemiroff [29] (MTU [30] ) & Jerry Bonnell [31]
                                  (UMCP [32] )
          NASA Official:  Phillip Newman Specific rights apply [33] .
              NASA Web Privacy Policy and Important Notices [34]
              A service of: ASD [35]  at NASA [36]  / GSFC [37]
                           & Michigan Tech. U. [38]
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Site notes:
  [1] archivepix.html
  [2] http://get.adobe.com/flashplayer/
  [3] http://htwins.net/
  [4] ap100725.html
  [5] ap160815.html
  [6] http://en.wikipedia.org/wiki/Identical_partic...
  [7] ap120107.html
  [8] http://en.wikipedia.org/wiki/Fantastic_Voyage
  [9] http://www.youtube.com/watch?v=47CIdUld8eQ
  [10] http://www.wisegeek.com/where-does-dust-come-...
  [11] http://www.youtube.com/watch?v=4PKjF7OumYo
  [12] http://en.wikipedia.org/wiki/Airborne_disease
  [13] http://htwins.net/scale2/
  [14] https://www.youtube.com/watch?v=uaGEjrADGPA
  [15] ap150324.html
  [16] ap100120.html
  [17]
http://www.kruger-2-kalahari.com/images/
the-long-the-tall-and-the-short-21373953.jpg
  [18] ap181006.html
  [19] archivepix.html
  [20] lib/apsubmit2015.html
  [21] lib/aptree.html
  [22] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [23] calendar/allyears.html
  [24] /apod.rss
  [25] lib/edlinks.html
  [26] lib/about_apod.html
  [27] http://asterisk.apod.com/discuss_apod.php?dat...
  [28] ap181008.html
  [29] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [30] http://www.phy.mtu.edu/
  [31] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [32] http://www.astro.umd.edu/
  [33] lib/about_apod.html#srapply
  [34] https://www.nasa.gov/about/highlights/HP_Priv...
  [35] https://astrophysics.gsfc.nasa.gov/
  [36] https://www.nasa.gov/
  [37] https://www.nasa.gov/centers/goddard/
  [38] http://www.mtu.edu/

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 * Origin: FIDONet - The Positronium Repository (1:393/68)