公用資料庫 Public Databases 彙整
免費圖庫：
Google 谷歌
https://www.google.com.tw/
Creative Common
WikimediaCommons
https://commons.wikimedia.org/wiki/Main_Page
Pixabay (需要註冊)
https://pixabay.com/
Smithsonian Open Access 史密森
https://www.si.edu/openaccess
British Library Pro
https://www.flickr.com/photos/britishlibrary/albums
The British Museum
https://research.britishmuseum.org/research/libraries_and_archives.aspx
天文圖庫：
NASA Image and Video Library
NASA videogallery (Education, personal web pages)
(Media Usage Guidelines)
NASA videogallery (Education, personal web pages)
Hubble Resource Gallery (public domain)
Hubble Gallery
(copyright)
ESO
NASA: Hubble’s Messier Catalog
https://www.nasa.gov/content/goddard/hubble-s-messier-catalog#grid
Free Star Charts
Google is so powerful that it "hides" other search systems from us. We just don't know the existence of most of them.
Meanwhile, there are still a huge number of excellent searchers in the world who specialize in books, science, other smart information.
Keep a list of sites you never heard of.
www.refseek.com - Academic Resource Search. More than a billion sources: encyclopedia, monographies, magazines.
www.worldcat.org - a search for the contents of 20 thousand worldwide libraries. Find out where lies the nearest rare book you need.
https://link.springer.com - access to more than 10 million scientific documents: books, articles, research protocols.
www.bioline.org.br is a library of scientific bioscience journals published in developing countries.
http://repec.org - volunteers from 102 countries have collected almost 4 million publications on economics and related science.
www.science.gov is an American state search engine on 2200+ scientific sites. More than 200 million articles are indexed.
www.base-search.net is one of the most powerful researches on academic studies texts. More than 100 million scientific documents, 70% of them are free
2020-03-29
2020-10-12
2023-06-16
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