1. 
   nucleocosmochronology
   nucleocosmochronology A technique that attempts to estimate the age of astronomical objects by measuring the relative abundances of isotopes (any of two or more atoms of an element having the same number of protons, but a different number of neutrons in its nucleus).
   Found op http://www.wordinfo.info/words/index/info/view_unit/1423/
   
   
2. 
   Nucleocosmochronology
   Nucleocosmochronology, also known as cosmochronology, is a relatively new technique used to determine timescales for astrophysical objects and events. This technique employs the abundances of heavy radioactive nuclides to calculate the age of formation of astronomical objects in a similar fashion t...
   Found op http://en.wikipedia.org/wiki/Nucleocosmochronology
   
   

Tip: double click on a word to show its meaning.