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On 2024-11-12 21:35:12 +0000, LaurenceClarkCrossen said:Poincare has been explaining how absurd
The Universe Is Not A SphereSo it seems. However, the part of the Universe we can see looks,
except for minor irregularities, very similar to a small part of
a large sphere. But so does a small part of an Euclidean space.
So, parallel lines on its surface do not meet.The path of a photon is a special kind of straight line. Light from
certain quasars (e.g. SBS 0957+561) come to us over two paths so that
the same qasars can be seen in two directions. This shows that two
stright lines can cross twice.
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