Comment by xhkkffbf

Comment by xhkkffbf 16 hours ago

5 replies

I understand the appeal of using the same combinations everywhere, but I thought the great thing about the metric system was that it was easy to convert. So 8000 m/s is 8 km/s.

drillsteps5 15 hours ago

The problem is with the "hours" part. Which, not accidentally, is not even part of the SI.

  • schiffern 15 hours ago

    In the official BIPM brochure, hours are technically classified as "Non-SI units accepted for use with SI." This puts them in the same category as liters, hectares, tonnes, decibels, etc.

    https://en.wikipedia.org/wiki/Non-SI_units_mentioned_in_the_...

    • drillsteps5 15 hours ago

      I can read Wikipedia too. All the calculations are done in m, s, g, etc. if you want to dumb it down to the public you might as well go in miles per hour, leagues per day, etc., spaceflight is not the place where it is appropriate.

      • nomel 10 hours ago

        > spaceflight is not the place where it is appropriate.

        But, a video stream meant for the public consumption is. SI are standardized for the context of calculations, not necessarily for human consumption, which happens to be why nobody gives the weather in degrees kelvin.

      • SECProto 12 hours ago

        > if you want to dumb it down to the public you might as well go in miles per hour,

        The blue origin launch this week used mph and feet of elevation, and I can definitively say that using modified SI is way way better than US customary