This applet illustrates the challenges of communicating with extraterrestrial civilizations. It shows a galaxy with a diameter of 100,000 light years. The user is able to control the average lifetime of communicating civilizations and the birth rate of such civilizations in the Milky Way galaxy. After hitting start, Earth appears and begins transmitting its signal. When Earth receives a signal from another civilization, a line appears connecting them. The applet will automatically pause when Earth ceases to communicate. Signals change color when a civilization ceases to exist.
This is part of a larger collection of applets by STEM Colorado focused mostly on topics in astronomy.
Please note that this resource requires
at least version 1.4.2_06 of
McCray, Richard, and Andrew Koelemay. STEM Colorado: Galactic Communication. August 27, 2008. http://scatter.colorado.edu/STEM-TPSoft/java/javaapps/civcomm2/CivCommApp2.jnlp (accessed 26 October 2014).
%0 Electronic Source %A McCray, Richard %A Koelemay, Andrew %D August 27, 2008 %T STEM Colorado: Galactic Communication %V 2014 %N 26 October 2014 %8 August 27, 2008 %9 application/java %U http://scatter.colorado.edu/STEM-TPSoft/java/javaapps/civcomm2/CivCommApp2.jnlp
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