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Gravity and the Size of the Universe

Whenever human understanding of the size of the universe is at a breakthrough point, a new idea about the nature of gravity introduces itself to the world. For thousands and thousands of years, the magnitude of the cosmos was limited to the stars that could be seen in the night sky (not that people knew what they were looking at). Just over 400 years ago, a tremendous breakthrough came. The telescope arrived, and drastically changed our view of the heavens. A mere 60 years later (a drop in the ocean of historical time), gravity was compared to the fall of an apple and Isaac Newton proposed that the moon traces out the curve of its orbit by constantly "falling" towards Earth. Things progressed steadily for over 200 years - telescopes grew bigger, planets and stars were discovered, and the universe became as large as the Milky Way galaxy. About the same time that we were starting to wonder if there other galaxies out there (a concept that would vastly increase the universe's size again), another gravitational breakthrough came. Albert Einstein reinterpreted the moon’s being constantly tugged towards Earth by our planet’s gravity. He said the moon is “pushed” towards Earth by the hills and valleys of curved space-time surrounding this world. Since then, things have – despite the inevitable dead ends science embarks on but sooner or later corrects - steadily progressed once more. Complacency seems to have arisen, because many appear to think real science never means anything except continual slow progress. There’s a new idea in the world, however – that the universe may be infinite. This would drastically increase the size of the universe once more, and herald another breakthrough in comprehension of gravity. The ideas of Newton and Einstein embrace the entire universe, and the truth in their theories has been repeatedly confirmed. It’s only logical that elements of both Newtonian and relativistic gravity must be present in a new “infinite universe gravity” (IUG). The universe can’t possibly be larger than infinite – even hypothetical multiverses and cyclic universes would be included in its infinity if they existed. So you might think an idea of infinite gravity would be the final breakthrough in understanding gravity. But it would be terrible if learning could reach an end – the infinite nature of gravity implies it might undergo infinite refinements over the eons.