Hi to you all!
I went a bit philosophical some days ago after reading about the new discoverys from the massive Planck's telescope
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=51557 (http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=51557) Anyway here is how it goes
You need to add two forces to balance the equation how the visual/physical moves around in space. Dark Matter & Dark Energy.
I do not think they were so good really. The word black indicate that something must inhabit the "color" black if examen. Examen in a labrotary in this case is not possible so a better description in this case should be invisible matter. And also invicible force. if you use those words instead you get this:
Invicible Matter
Invicible Force
This description is more what it is and it's more easy to put together in mind what is really behind it :wink:
Very Slight difference between two states.