# Charles S. Day

Editor-in-chief, Physics Today,

American Institute of Physics

1 Physics Ellipse

College Park, MD 20740

Book: *The Evolution of X-ray Binaries*

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*First email: 8 October 2019 at 12:12 PM

**RE**: Time’s illusive nature… October 6, 2015 over four years ago feels like yesterday! And the 18 years before that flew by as well. So shouldn’t we asking, “What is time?” when it all feels like yesterday.

Hi Charles,

How did I ever end up on your introductory page from October 5, 2015? The internet brings us all together in the most elusive *and* direct ways. Given all your strengths — PhD in X-ray astronomy from the University of Cambridge in 1988 — you might enjoy a little thought experiment: “If we take the Planck base units, and multiply them by 2, over and over again, how many steps would it take to get to the current moment in time (assuming Planck Time is the first moment in time)?” Answer: https://81018.com/chart/

What a question! Might it help to know that the universe is just about 436,117,076,640,000,000± seconds old? (Not really) It is a rather peculiar notion that the age of the universe, of course, can be computed in seconds. Might it help to know that the first second falls between Notations 143 and 144? https://81018.com/formulas/

Yes, we mapped the universe in 202 base-2 notations (doublings) in a high school geometry class. It was a result of playing with embedded geometries and by asking Zeno’s question, and by wondering what we should do when we hit the Planck wall. We didn’t know what we didn’t know. https://81018.com/home/

That Planck scale has not been explored enough! We started our explorations back in 2011. The chart emerged in 2016. Nobody has debunked that little chart, even after repeated requests of some of our finest scholars! https://81018.com/alphabetical/ Yes, we’ve reached out to some of our best.

I hope you are intrigued enough to take a look. Why does the logic and math look straightforward but it is all summarily ignored?

Thanks.

Bruce

*The first email to Charles Day but the third email to AIP and *Physics Today*.