우주론의 역사
Physics in the multiverse – CERN Courier
http://cerncourier.com/cws/article/cern/31860http://arxiv.org/PS_cache/quant-ph/pdf/0210/0210152v1.pdf
http://arxiv.org/PS_cache/quant-ph/pdf/0210/0210152v1.pdfMany-Worlds Interpretation of Quantum Mechanics (Stanford Encyclopedia of Philosophy)
http://plato.stanford.edu/entries/qm-manyworlds/
우주 관측의 역사
Hubble Home
http://hubblesite.org/Internal Page
http://www.stsci.edu/ftp/science/hdf/hdf.html대한민국의 국보 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%EB%8C%80%ED%95%9C%EB%AF%BC%EA%B5%AD%EC%9D%98_%EA%B5%AD%EB%B3%B4국보 경주 첨성대 (慶州 瞻星臺) : 국가문화유산포털 - 문화재청
http://www.cha.go.kr/korea/heritage/search/Culresult_Db_View.jsp?mc=KS_01_02_01&VdkVgwKey=11,00310000,37Error 404 (Not Found)!!1
http://books.google.com/books?id=32IDpTdthm4C&pg=PA67&lpg=PA67&dq=newton+reflecting+telescope++1668+letter+1669&source=bl&ots=PKABaGwPaN&sig=rPS8w23_nAp3kH5YMYGZ7JHhOaI&hl=en&ei=0QC1Svf7AsWb8Aa3nqGTDw&sa=X&oi=book_result&ct=result&resnum=5#v=onepage&q=newton%20reflecting%20telescope%20%201668%20letter%201669&f=false북두칠성 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%EB%B6%81%EB%91%90%EC%B9%A0%EC%84%B1웨이백 머신 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%EC%9B%A8%EC%9D%B4%EB%B0%B1_%EB%A8%B8%EC%8B%A0천문우주지식포털 :: 천문학습관
https://web.archive.org/web/20130816074035/http://astro.kasi.re.kr/Main/ContentViewForm.aspx?MenuID=1223#천문우주지식정보
http://astro.kasi.re.kr/Main/ContentViewForm.aspx?MenuID=1223
우주
Universe Meaning | Best 18 Definitions of Universe
http://www.yourdictionary.com/universe