Good sites

[Simsim]

I liked to put some interesting scientific sites here. I found them simple and nice. Any addition is welcome.

1- Dynamic periodic table:

http://www.ptable.com/

The default table is viewed under 0 Celsius ( 273 Kelvin). But you can change the temperature to see which elements are solid, liquid or gas over variant temperatures.

[Kayenneh]

Khan Academy

[Simsim]

2- An atlas of the universe:


http://www.atlasoftheuniverse.com/


This is a simple astronomy site (Pictures are everywhere ) You can view the range over which you want to look through the universe. For example this the universe within 12.5 light years in which you can see the nearest stars to us:

http://www.atlasoftheuniverse.com/12lys.html

By zooming out you can see the universe within 250 light years:

http://www.atlasoftheuniverse.com/250lys.html

You can also have different maps for the same portion of the universe as you will see in the site. Enjoy it !

[Simsim]

3- Curious about astronomy?

http://curious.astro.cornell.edu/index.php

This is an astronomy site which give a large amounts of information about this branch of science. You can even ask a question and you will find specialized astronomers answering you. This is a list of all previously answered questions:

http://curious.astro.cornell.edu/list.php

Generally, it is a very useful site. You can pick much information you need from it quickly.

[Simsim]

4- Hypephysics:

http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

A nice site for physics. If you are searching for brief information about a physical material this site would fit you.

[Simsim]

5- Gravity probe:

http://einstein.stanford.edu/index.html

This site is for who are interested in special relativity, general relativity, gravity and the shape of the universe. There is a good section in this site for the most important questions about the theory of relativity. Here is:

http://einstein.stanford.edu/content/rel...qanda.html

[Simsim]

6- Free science books:

http://freescience.info/index.php

This site is rich to the extent that you can use it to easily make a kind of a scientific academic library on your computer. It gives its maximum advantages when used by science undergraduates. Recommend it to them !