What's so great about Celcius? Its as arbitrary as anything else.
Arbitrary? How so?
I always felt Celsius made a lot more sense than anything else. Set the 0 to when water freezes, and make boiling (at sea level anyway) a nice round number that makes sense. Hey, why not 100?!
Need a metric for distance? Why not customize it to the planet we live on? So Anders, being a astronomer, used the diameter of the earth and broke it down (originally anyway) to 10,000,000 units. Actually it's closer to 13,000,000 meters as the planet isn't a perfect sphere, but you get the idea.
Celsius doesn't seem arbitrary to me at all. It's based on physical facts of the world around, which are repeatable. Hundreds of years ago I bet everyone had a slightly different take on what constitutes a precise barleycorn count or how much land an ox could plow in a single day. I think we can agree on that being one arbitrary acre.
