Hi Piman

Thanks for the welcome.

Curving a line into a circle would be valid if space on the large scale proved to be actually curved.

Latest observed measures of space indicate that it is flat at least out to the most distant galaxies.

General Relativity curves space which is ok, but theory has to match observation. Each galaxy can curve space but a curve in each direction from every galaxy results in a straight line.

snowflake
Hi Piman