Well, Ernie Wright was curious so he compared Galileo's sketches of Jupiter's four large satellites to what we now know and came up with the attached GIF.
The ASCII art lookin' stuff is Galileo's sketches.
See here for a full writeup: http://home.comcast.net/~erniew/astro/sidnunj.html
Originally posted on Google+ · March 13, 2013
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