The periodic table of chemical elements is a masterpiece of organized chemical information. The elements represent stuff of matter, stuff that matters. Not only on Earth but also on other celestial bodies.
Dark matter is a special type of matter. It accounts for an estimated 84% of matter in the universe and 23% of the mass-energy. Dark matter cannot been observed by eye, it doesn't emit or absorb light or other electromagnetic radiation at any significant level. Instead, its existence and properties are inferred from its gravitational effects on visible matter, radiation, and the large scale structure of the universe (http://en.wikipedia.org/wiki/Dark_matter).
With the aid of the Hubble Space Telescope it was possible to identify a small filament of dark matter, an invisible cosmic structure that can only be detected by the gravitational effects it has on its surroundings. Scientists have been able to construct a 3-D view of the filament, the first time ever that the difficult-to-detect dark matter has been measured in such detail (https://www.facebook.com/AstrophysicsAndAstronomy).
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| First 3-D model of dark matter |
The Periodic Table of Elements:
The periodic table of elements according to relative abundance. The table will vary for other celestial bodies. Who cares?
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| https://www.facebook.com/AnalyticalChemistryTechniques |
The version of the periodic table of elements below visualizes the occurrence of the particular elements in objects of daily life.
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| http://www.sciencegeek.net/tables/tables.shtml |
Dmitri Mendeleev (creator of the first version of the periodic table of elements in 1869).
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| Dmitri Mendeleev: http://en.wikipedia.org/wiki/Dmitri_Mendeleev |
And what about this one?
Links:
- WebElements: Lots of key information about the chemical elements of the periodic table (http://www.webelements.com/index.html)
- The Universe: A facebook platform dediicated to discussion Astronomy and Astrophysics (https://www.facebook.com/AstrophysicsAndAstronomy)
