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Well the ancient Sumerians said it was a disk, and NASA says it's a sphere and it's well known that NASA lies about everything, so what more proof do we need? No point in looking at the STEREO satellite images of the sun proving it's not a disk because NASA faked those too, right?
Originally posted by wingsfan
wow!! I assumed he was gonna say something completely different, but the sun is a disk?!?!
The ball is the disk generalised to metric spaces. However, sometimes "disk" is used to mean "ball".
A ball in the Euclidean plane, for example, is the same thing as a disk, the area bounded by a circle.