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S.Vasojevic
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If geometry of spacetime is flat in intergalactic medium (empty space), why then there is no point of asking where is the center of Universe?
A "flat" universe refers to the overall shape of the universe, specifically its geometry. In a flat universe, the geometry is described as being "flat" or "Euclidean," meaning that the angles of a triangle always add up to 180 degrees and parallel lines never meet.
No, a flat universe does not have a center. In a flat universe, the matter and energy are evenly distributed throughout the universe, meaning there is no central point or location that can be considered the "center". The concept of a center only applies in a curved universe.
Scientists have studied the cosmic microwave background radiation, which is leftover radiation from the Big Bang, to determine the overall geometry of the universe. This radiation appears to be evenly distributed, indicating a flat geometry. Additionally, the measurements of the angles of triangles in the universe also support the idea of a flat universe.
Yes, a flat universe can expand forever. In fact, recent observations suggest that the expansion of the universe is accelerating, meaning that it will continue to expand indefinitely. This expansion would maintain the flat geometry of the universe.
A flat universe has several important implications for our understanding of the universe. It suggests that the universe is infinite in size and will continue to expand forever. It also supports the idea of the cosmological principle, which states that the universe looks the same in all directions and at all locations. Additionally, a flat universe is a key component of the currently accepted model of the universe, known as the Lambda-CDM model.