sources of information
http://www.nasm.si.edu/apollo/AS11/a11sum .
http://www.fourmilab.ch/earthview/lunarform/cratallp.html
http://zebu.uoregon.edu/~soper/Moon/history.html
http://lunar.arc.nasa.gov/project/overview.htm
http://www.psi.edu/projects/moon/moon.html
http://www.badastronomy.com/bitesize/solar_system/moon.html
http://es.rice.edu/ES/humsoc/Galileo/Things/moon.html
http://eclipse.span.ch/total.htm
http://www.solarviews.com/eng/moon.htm
http://www.space.com/news/esa_plans_020116.html
http://seds.lpl.arizona.edu/nineplanets/nineplanets/luna.html
http://www.fourmilab.ch/earthview/moon_ap_per.html
http://www.lpi.usra.edu/expmoon/future/future.html
http://eclipse.span.ch/total.htm
http://www.moon-phases.com/map-of-the-moon/moon-map-f1.html
http://home.earthlink.net/~paltner/moon/sf_moon.html
http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html http://www.pantheon.org/articles/a/artemis.html
http:// www.pantheon.org/articles/s/selene.html
http://www.solarviews.com/eng/moon.htm
http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question3.html
http://www.inconstantmoon.com/cyc_phas.htm
http://www.enchantedlearning.com/subjects/astronomy/moon/Phases.shtml
Boock: "Las Maravillas del Cielo (astronomía y astronáutica)", Edición: DANAE
Boock: "Observar el cielo II", Editorial: GeoPlaneta
