Astrophysics for People in a HurryAstrophysics for People in a Hurry by Neil deGrasse Tyson

My rating: 4 of 5 stars

Oppose the gravitational force with your phalanges if you value science.

Science communicator Neil deGrasse Tyson understands that most people don’t have time to read physics books – plus they are hard work to read. So he decided to package together some of his essays into a book that covers the major aspects of astrophysics in a way anyone could enjoy and learn from.

While reading this book I had a revelation. Could there be an explanation other than Dark Matter and Dark Energy for the gravity and expansion of the universe?

I’m going to propose Pratchett’s Theorem as an alternate hypothesis for the expansion of the universe and gravity. Since the universe is flat and there are unexplained gravity and expansion, I postulate that this flat universe is riding on the backs of four large elephants. This explains the gravity pulling everything down. These elephants are riding on the back of a large turtle who swims through the multiverse. The elephants are slowly moving away from one another – which explains the expansion – and walking down the curved shell of the turtle such that each step is larger than the last – which explains the increased speed of expansion.

This, of course, raises the questions of whether it was the elephants who were the prime movers behind the “Big Bang”, whether the elephants will keep walking down the shell until they fall off tearing the universe to shreds, or whether the elephants will eventually decide to walk back toward one another for a reunion? Do they also walk directly away from one another, or do they walk around the shell, such that the universe rotates? Given everything within the universe rotates, it would only make sense that this rotation is caused by the elephant’s motion.

Anyway, NDGT’s book was a good read. It doesn’t dumb things down, nor use too many lay terms, which was refreshing. But as a scientist, albeit in a completely different field, it felt like the book was aimed at a more general audience, particularly those who aren’t familiar with many of the topics discussed. Which made it only a good but not a great read for me.

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