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Expansion of the Universe |
This is annoying since there are stars older than this. The ancient star clusters known as globular clusters can be as old as 14 - 16 billion years (based on our understanding of stellar evolution).
![]() ExplosionA natural explanation is that an explosion occurred and that we are at the center of the Universe. Consequently, the galaxies are flying away from us in all directions and that the ones with larger initial kicks are now farther off. |
![]() Uniform ExpansionThe current preferred explanation is that the Universe expands uniformly (with no center). In this scenario, any observer in the Universe sees essentially the same thing and all observers find the same Hubble's Law! |
Initially, the choice was not obvious as to which of the above was correct. However, by this time people were loathe to believe that we occupied a preferred spot in the Universe. The Hubble law was interpreted as an indication of the uniform expansion of the Universe.