NASA uses a value of π = 3.141592653589793 with 15 decimal digits for interplanetary navigation.

Calculating the circumference of the circle with radius = 32 billion km, slightly larger than the distance of the Voyager 1 spacecraft, and π with 15 digits, gives an error of just 1.5 cm.

Calculating the circumference of the Universe with radius = 46 billion light years, with an accuracy equal to the diameter of a hydrogen atom, requires 37 decimal digits.
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https://www.jpl.nasa.gov/edu/news/how-many-decimals-of-pi-do-we-really-need/
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