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How are the universe galaxies and stars all related?

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They all have same nature laws and particles and were all formed as a consequence of the Big Bang some 14.5 billion years ago. .
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What is a galaxy in relation to the universe?

A galaxy consisting of a few hundred billion stars is a mote of dust in the vastness of the universe.  Our galaxy (the Milky Way) is about 100 000 light years across, the clo

How many stars and galaxies are there in the universe?

The answer has to be estimated; for many reasons no one can ever know the exact numbers, whatever that might mean in this context. Estimates of the number of galaxies in the u