How Wide Can a Universe Get?

“Despise not the day of small beginnings…” Zechariah 4:10

Who knew a scripture from the Holy Bible that I have heard all my life and have quoted to myself plenty of times would apply to my last blog post.  But, it does especially when referencing the start of our universe.  And, the universe has sense expanded and continues to expand.

In Sky & Telescope in an article entitled, HoLi Cow! Is Our Universe Expanding Faster Than We Thought?, Monica Young introduces the reader to new studies that pose the possibility that the expansion of the universe may be taking place at a fast pace.  Discrepancies have been found in the Hubble Constant measurements.  Studying quasars along with Cepheid stars, supernovae, galaxy clusters, the cosmic wave background, and their energy release has opened up the minds of researchers and caused them to question their previous thoughts on the expansion of the universe.

According to a slide we went over in class, astronomers believe that large galaxies formed from quasars.  Please see the picture below.

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Gravity is the key factor in galaxy formation. And, as galaxies form at a faster pace, the universe expands at a faster pace.   According to Hubble’s Law, as our universe continues to grow with help of these energy sources, galaxies are moving further and further out from where they started.  The further a galaxy is away from a central point, the faster it moves.

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I have my own theory that lines up with this that relates to a merry-go-round.  The closer you are to the outer parameters on the merry-go-round, the faster you go.  The further a galaxy is in the universe, the faster it moves.   The continuous gravity interaction among galaxies causes collisions and mixtures of gases.  In turn, this can add to the energy produced and production of more celestial bodies which can produce supernovas, black holes, and more stars.  These are the areas that the researchers in the article have explored.

As more thorough research is done on the universe, we will be able to better understand the expansion of it.  I feel as though there will always be discrepancies in our measurements of the universe.  As long as celestial sources with very high luminosity readings like quasars exist, we will always need to re-explore how we measure the expansion of the universe.  It is an ongoing battle.  But we can’t deny that we have progressed very far from a small beginning.

 

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