Astronomy for all
Wednesday December 12th 2012

The Solar System is older than we previously thought

The usual method for defining the age of the Solar System is to determine the time of the formation of the first solid grains in the disc surrounding the proto-Sun. Currently we date calcium-aluminium-rich  inclusions in meteorites.  A recently published study in Nature Geoscience has revised the current age of the Solar System to be .3 to 1.9 million years older than our currently estimate. While the timing may not seem like a big difference for something that is billions of years old, Bouvier said in New Scientist that it could make a difference when pinning down the conditions that led to the solar system‘s formation, and those needed for other life-friendly planetary systems to form. So how old are we talking about? The 1.49Kilo meteorite found in the Moroccan desert in 2004 suggests that the Solar system is  about 4.56 billion years old.

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