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The Scale of the Universe

This interactive page allows you to explore the universe and how we measure size, from the incredibly small to the incomprehensibly big.

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http://www.nikon.com/about/feelnikon/universcale/index_f.htm

Cool Cosmos - Revealing the Universe in All of its Light!

Wonderful resource about observing the universe through radio,infra-red, visible, ultra-violet and gamma-rays.

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Hits: 258

http://coolcosmos.ipac.caltech.edu/

The Elemental Composition of the Universe

What is our universe made of, and why?

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Hits: 1083

http://imagine.gsfc.nasa.gov/docs/science/mysteries_l2/composition.html

Is The Universe Closed?

Does the theory of relativity imply a closed finite universe? This site tries to explain the theories. Very text heavy!

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Hits: 1876

http://mathpages.com/rr/s7-01/7-01.htm

Uranium reveals the age of the universe

An article from Physicsworld: Astronomers have spotted for the first time the fingerprint of uranium-138 in an ancient star - and have used it to make the most reliable guess yet of the age of the ...

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Hits: 1258

http://physicsworld.com/cws/article/news/2733

Why Does Our Universe Have Three Dimensions?

A brief waltz through string theory to answer the question why our universe has three dimensions

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Hits: 252

http://news.discovery.com/space/why-does-our-universe-have-three-dimensions-120119.htm

The Electronic Universe

The Electronic Universe contains materials on sciences from all fields, from physics to geology, as well as 'Javalab' - a collection of JAVA physics applets designed for use as a virtual laboratory.

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Hits: 1355

http://zebu.uoregon.edu/
15 things you didn't know about outer space

15 things you didn't know about outer space

How many galaxies are there in the universe? Nice infographic with some cool facts about our universe, the solar system and outer space.

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Hits: 1550

http://www.onlineschools.org/blog/outer-space/

Shapley-Curtis Debate (1920) about the scale of the universe.

Essay on the debate about the scale of the Universe with links to other cosmological debates.

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Hits: 1027

http://antwrp.gsfc.nasa.gov/diamond_jubilee/debate_1920.html

Nicolaus Copernicus

Nicolaus Copernicus (1473 - 1543) provided a model of the universe in which the earth and all the other planets orbit around the sun and the earth acquired a daily rotation, but the sun itself was ...

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http://www.hps.cam.ac.uk/starry/copernicus.html
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