http://www.nasa.gov/http://www.eso.org/http://www.esa.int/esaCP/Spain.htmlhttp://www.jaxa.jp/index_e.htmlhttp://www.aeb.gov.br/
http://ciencia.nasa.gov/
http://www.iac.es/cosmoeduca/ http://www.astroex.org/spanish/ http://sites.google.com/site/astronomia2009uy/ejercicios-interactivos-1
http://cosmos.astro.uson.mx/INFORMATICA/educacion.htm
http://cosmos.astro.uson.mx/INFORMATICA/divulgacion.htmhttp://www.planetariodebogota.gov.co/ http://www.maloka.org/corporativo/
http://www.stellarium.org/de/http://www.shatters.net/celestia/download.htmlhttp://celestia.softonic.com/
http://spaceplace.nasa.gov/sp/kids/http://www.eso.org/public/outreach/eduoff/cas/http://www.nasa.gov/mission_pages/cassini/whycassini/cassini_scientist_for_a_day_060131.htmlhttp://marsprogram.jpl.nasa.gov/rockworld/http://science-edu.larc.nasa.gov/SCOOL/Spanish/http://radiojove.gsfc.nasa.gov/http://beamartian.jpl.nasa.gov/welcomehttp://www2.jpl.nasa.gov/ambassador/
http://marsparticipate.jpl.nasa.gov/msl/participate/sendyourname/http://polls.nasa.gov/utilities/sendtospace/jsp/sendName.jsp
http://www.exploratorium.edu/ronh/weight/ http://www.exploratorium.edu/ronh/solar_system/
http://books.google.com.co/books?id=YEUZI8MWARQC&lpg=PA191&dq=Universo%20en%20expansi%C3%B3n&lr=&as_brr=3&rview=1&pg=PP1#v=onepage&q=&f=true
http://sondasespaciales.com/