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This is an animation made from a subset of data taken from the 2 degree Field Galaxy Redshift Study.  Each dot in the image represents a galaxy within a wedge of sky covered by the survey.  Notice how galaxies clump into clusters as well as 'walls', sheet-like structures that span enormous distances.  There are also vast voids where galaxies are absent.  The length of this wedge is 4 bln light years.


Image info

The data from 2dFGRS was downloaded as text and parsed into Excel.  Redshifts were converted into distance using a Hubble constant of 70.  Then distance, RA and Dec coordinates were converted into x, y, z rectangular coordinates.  These were then written out to a text file in a format that could be plotted by Graph3D, a freeware 3d plotting program by R Hart.  BMP's from this program was converted in Adobe ImageReady into an animated GIF.

This animation needs quite a bit of processing power and may play better if it is saved to disk and displayed using eg. ACDSee.

Copyright 2003 to 2014, by TG Tan.  All rights reserved.  Copyright exists in all original material available on this website.  This material is for your personal individual, nonprofit use only.  Redistribution and/or public reproduction of this material is strictly prohibited without prior express written permission from the author.