"In these objects, a previous outflow of ... in all directions," wrote the astronomers. "This sphere of stellar detritus shows itself as a circle." Radio imagery has also revealed a number of ...

In these objects, a previous outflow of material has cleared the space around the star, allowing the current outburst to expand symmetrically in all directions. This sphere of stellar detritus shows ...

To the square, which can see only a slice of the sphere, the shape before him is that of a two-dimensional circle. The sphere has visited the square intent on making the square understand the ...