sumber tata surya

https://rantikula.files.wordpress.com/2010/06/bab1_mengenal-tata-surya.pdf

http://edukasi.kompasiana.com/2012/01/10/teori-terbentuknya-alam-semesta-tata-surya-dan-bumi-426399.html

regiaza.pun.bz/files/sistem-tata-surya-1.pdf

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&sqi=2&ved=0CCEQFjAB&url=http%3A%2F%2Fstaff.uny.ac.id%2Fsites%2Fdefault%2Ffiles%2Flain-lain%2Fikhlasul-ardi-nugroho-mpd%2FSistem%2520Tata%2520Surya%2520ver_Akhir_hasil%2520proses%2520editing.pdf&ei=pwE7Ve_rBNKhugTe-wE&usg=AFQjCNELmM-2w7IiV3pNPVkB9Vod73hVIg&bvm=bv.91665533,d.c2E

staff.uny.ac.id/sites/default/files/...%20M..../Handout%20IAD%202.pdf

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CC0QFjAC&url=http%3A%2F%2Fstaff.uny.ac.id%2Fsites%2Fdefault%2Ffiles%2Fpendidikan%2FYuni%2520Wibowo%2C%2520M.Pd.%2FHandout%2520IAD%25202.pdf&ei=YBs7VfOFJsyJuwTHg4DQAQ&usg=AFQjCNGkhyIFSZimdne3i57vbKYMe_FyPg&sig2=lj3jAwQojJaPn2FlyPZ-IQ&bvm=bv.91665533,d.c2E

https://geopustaka.files.wordpress.com/2012/10/modul-jagat-raya-dan-tata-surya-x.pdf