Kilder for Nattehimmelen og stjernebilder

http://no.wikipedia.org/wiki/Klaudios_Ptolemaios

http://no.wikipedia.org/wiki/Stjernebilde

http://no.wikipedia.org/wiki/Stjerne

http://www.rundetaarn.dk/dansk/observatorium/stjernebilleder/indhold.htm

http://www.rundetaarn.dk/dansk/observatorium/stjernebilleder/uma.htm

http://www.rundetaarn.dk/dansk/observatorium/stjernebilleder/umi.htm

http://images.google.no/imgres?imgurl=http://www.bergenvitensenter.no/Planetarium/planetariumlogo_4273_copy.jpg&imgrefurl=http://www.bergenvitensenter.no/Planetarium/index.html&h=163&w=317&sz=21&hl=no&sig2=OA6Z2KpVZ3pkWa-rEp5_qA&start=7&tbnid=Wio_ua4uQHCIzM:&tbnh=61&tbnw=118&ei=_bvoRYP0K6HkyALYwLHGCQ&prev=/images%3Fq%3Dkarlsvogna%26svnum%3D10%26hl%3Dno%26rlz%3D1T4GFRD_noNO210NO210%26sa%3DN

http://images.google.no/imgres?imgurl=http://www.nrk.no/img/584248.jpeg&imgrefurl=http://www.nrk.no/programmer/tv/newton/5596083.html&h=184&w=460&sz=6&hl=no&sig2=uFAf5jmzS89wNzvVPPNTHw&start=31&tbnid=R42FzUlW0ixaGM:&tbnh=51&tbnw=128&ei=QbzoRfOVA4-uyQKgmrixCQ&prev=/images%3Fq%3Dkarlsvogna%26start%3D18%26ndsp%3D18%26svnum%3D10%26hl%3Dno%26rlz%3D1T4GFRD_noNO210NO210%26sa%3DN

http://images.google.no/imgres?imgurl=http://12koerbe.de/pan/ath-ptol.jpg&imgrefurl=http://12koerbe.de/pan/athen.htm&h=543&w=439&sz=67&hl=no&sig2=v6ioOLGBhng_cGCMctmfjQ&start=31&tbnid=4lUMujGdrx9zbM:&tbnh=132&tbnw=107&ei=k7zoRcaTHYvsyAL647GOCQ&prev=/images%3Fq%3Dptolemaios%26start%3D18%26ndsp%3D18%26svnum%3D10%26hl%3Dno%26rlz%3D1T4GFRD_noNO210NO210%26sa%3DN

http://www.mlahanas.de/Greeks/PtolemyAstronomy.htm