Interesting idea to use a unit that is universal to our galaxy.
However, using deci-arcseconds (1&#x2F;360&#x2F;360&#x2F;1000) seems arbitrary - it depends on the 360 degrees of a full circle and the decimal system.<p>Perhaps dividing the time period of 225million years by a power of two would be more universal.<p>For our life span, 2^27 looks good:<p>225.000.000 years &#x2F; 2^27 = 1.67638 years, 611 days<p>Or perhaps 2^28? That&#x27;d be 305.94 days