the Goddard Space Flight Center
This website gives an impression of the size of our Universe, starting with the Earth and increasing scale until it reaches the scale of the visible universe. The user can view and learn more about celestial objects that are used as examples. These objects include: the solar system, stars, the Milky Way galaxy, galaxies, clusters of galaxies, sheets, voids, and the farthest reaches of space.
%0 Electronic Source %A Masetti, Maggie %D March 1, 2008 %T The Cosmic Distance Scale %I Goddard Space Flight Center %V 2015 %N 1 March 2015 %8 March 1, 2008 %9 text/html %U http://heasarc.gsfc.nasa.gov/docs/cosmic/
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