Bibliografia
[1] http://www.nasa.gov/worldbook/comet_worldbook.html
[2] http://www.nineplanets.org/comets.html
[3] http://en.wikipedia.org/wiki/Comet
[4] http://www.astro.uu.se/~bjorn/eng_comet.html
[5] http://www.mps.mpg.de/en/topics/topic_200603.html
[6] http://www.ifa.hawaii.edu/faculty/jewitt/comet.html
[7] http://www.skyandtelescope.com/observing/objects/comets
[8] http://www.astronomy-education.com/index.php?page=27
[9] http://cometography.com/
[10] http://www.wiw.pl/astronomia/0612-us.asp
Zdjęcia
[1]^ Credit: NASA & ESA, H.Weaver, M.Muthler, Z.Leavy
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