Bibliografie

Agentia spatiala europeana [ http://www.esa.int ]

Observatoare, informatii si stiri astronomice.
Astronomie generala [ http://www.space.com/scienceastronomy/ ]
Catalog online al obiectelor Messier [ http://seds.org/MESSIER/ ]
Ce este lumina [ http://www.speed-light.info ]
Cosmologie [ http://cmb.physics.wisc.edu/cmb/index.html ]
Enciclopedie astronomica [ http://astronomy.wikia.com ]
Ghid al sistemului solar [ http://nineplanets.org ]
Ghid al sistemului solar [ http://science.nationalgeographic.com/science/space/solar-system ]
Google [ http://google.com ]
Misiuni spatiale [ http://www.nasa.gov/missions/index.html ]
Program freeware de planetariu [ http://www.stellarium.org ]

Orientare, coordonate astronomice, constelatii, planete, Soare, Luna.
Theo Koupelis: In quest of the Universe [ http://tinyurl.com/questuniverse ]

sixth edition, 2010
Wikipedia.org [ http://wikipedia.org ]