Quote:
Originally Posted by avandonk
Alex our solar system formed 4.67 billion years ago from dust and gas. Our system has a third? generation star. By third I mean that the majority of material that is our solar system on average has been through three cycles of stellar birth and then to planetary nebulae and supernovae.
This age can be deduced from the isotopic ratios of very long lived radioactive isotopes in meteorites. These isotopes have a long half life and the ratios change in a known way from the time of their creation in a supernova.
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Interesting comparison on the nebulae. Wasn't aware that our solar system was on take III. By isotopes in meteorites, are you saying that some of the material in their composition has survived 3 cycles?