www.nasm.edu/ceps/etp/pluto/pluto_atmos.html

www.nasm.edu/ceps/etp/pluto/pluto_explore.html

http://appukids.com/directory/Science_and_Nature/Astronomy/Planets/Pluto/

http://seds.lpl.arizona.edu/nineplanets/nineplanets/pluto.html

http://www.kidsastronomy.com/pluto.htm

http://www.kidsastronomy.com/pluto/moons.htm

http://pds.jpl.nasa.gov/planets/captions/pluto/plutoch.htm

http://www.enchantedlearning.com/subjects/astronomy/planets/pluto/

www.miksike.com/space/ space12.htm

http://cfa-www.harvard.edu/swas/pr010711/kuiperfig2thumb.html

Illustrerad vetenskap number 8 year 2002