Playing with DoubleDouble presicion

[zedd151]

I wonder how much precision is necessary to bring a spaceship safely to Mars. Any ideas?

https://www.iflscience.com/why-nasa-only-uses-a-handful-of-the-628-trillion-known-digits-of-pi-in-its-calculations-73401

That article from about a year ago, discusses how precise (in digits) NASA uses pi (16 including the integer part (3.) plus 15 decimal places)

That should give an idea of the precision used in some of its calculations and explanation why.
I just happened to be searching for some info on pi just today - and saw another member viewing this topic a few minutes ago in Who's Online.