AbsoluteAstronomy.com
General facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
http://www.absoluteastronomy.com/
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astronomy
science
reference
encyclopedia
space
research
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resource
knowledge
photography
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The Chandra X-ray Observatory Center :: Gateway to the Universe of X-ray Astronomy!
Designed to observe X-rays from high energy regions of the universe.
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astronomy
space
science
chandra
nasa
x-ray
photography
observatories
images
telescope
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Hubble Heritage Gallery of Images
No information avaiable
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astronomy
space
hubble
photography
images
science
photo
photos
cool
art
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Stellarium
Stellarium is planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free.
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astronomy
software
science
opensource
space
planetarium
freeware
free
windows
stars
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Encyclopedia - Online Dictionary | Encyclopedia.com: Get facts, articles, pictures, video
Find encyclopedia entries from the Columbia Encyclopedia, with links to newspaper and magazine articles, pictures, and maps. From Highbeam Research.
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encyclopedia
reference
research
dictionary
search
encyclopedias
education
resources
knowledge
free
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Science.gov : USA.gov for Science - Government Science Portal
Gateway to authoritative science and technology information provided by U.S. government agencies, including research and development results.
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science
government
reference
research
search
database
technology
education
resources
chemistry
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Scirus - for scientific information
Searchable directory of scientific information. Provides access to web listings and articles from journal sources.
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science
search
research
reference
searchengine
database
education
tools
academic
resources
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NSDL.org - The National Science Digital Library
NSDL online library for education and research in science, technology, engineering, and mathematics. Funded by the National Science Foundation.
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science
education
reference
library
resources
digital_library
technology
research
math
teaching
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奇迹文库:开放的知识库
qiji.cn. arxiv.org. answers.com ... qiji.cn. arxiv.org. answers.com. 豆瓣小组: 奇迹 奇迹翻译计划 自然科学史. 集智俱乐部. 百科资料: 医疗 饮食 理财 旅游 艺术 历史 文学 军事 生活 科学 ...
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science
reference
奇迹文库
resources
book
research
study
knowledge
books
科学
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Jet Propulsion Laboratory
Managed by the California Institute of Technology, is NASA's lead center for robotic exploration of the solar system.
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space
science
nasa
astronomy
technology
jpl
news
photography
images
physics
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Skymaps.com - Publication Quality Sky Maps & Star Charts
Quality sky maps (star charts) for stargazing, education and publishing. The Evening Sky Map free each month. Find constellations, planets and comets.
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astronomy
maps
stars
space
map
starchart
science
reference
free
astronomia
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