No, I still mean it. The variance from pole to equator is 0.5%.
Although it’s technically an oblate spheroid, technically anything you think of as a “sphere” isn’t a sphere either.
This is why it makes sense to talk about the earth scaled to objects you can comprehend. Is a ping pong ball a sphere? Is a basketball a sphere? When you blow bubbles, are those spheres?
Be consistent with your pedantry. Either they are and so is the Earth, or none of them are.
Other sources agree, the ball’s .005% spherical tolerance is an order of magnitude tighter than Earth’s. However, haven’t read the whole thing, gotta go.
No, I still mean it. The variance from pole to equator is 0.5%.
Although it’s technically an oblate spheroid, technically anything you think of as a “sphere” isn’t a sphere either.
This is why it makes sense to talk about the earth scaled to objects you can comprehend. Is a ping pong ball a sphere? Is a basketball a sphere? When you blow bubbles, are those spheres?
Be consistent with your pedantry. Either they are and so is the Earth, or none of them are.
True enough! Still, I can’t imagine a billiard ball with tolerances like that. I’ve shot 1,000 games and a ball being .5% off would be noticeable.
Enough anecdotes! Let’s get to evidence. Leaving in a few to hit the river, but this looks really interesting for when I get back:
https://possiblywrong.wordpress.com/2011/01/03/is-the-earth-like-a-billiard-ball-or-not/
Other sources agree, the ball’s .005% spherical tolerance is an order of magnitude tighter than Earth’s. However, haven’t read the whole thing, gotta go.