Bully Metric Foundations

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  https://www.merriam-webster.com/dictionary/bully
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  Slide 15 Notes
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  Slide 16 Notes
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  Slide 17 Notes (Bully Metric Astronomical Coordinates)
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Slide 15 Notes

Selected estimated values of the Hubble constant, 2001-2019. Estimates in black represent calibrated distance ladder measurements, red represents early universe CMB/BAO measurements with ΛCDM parameters while blue are independent measurements.

The lookback time of extragalactic observations by their redshift up to z = 20

The exact value of the Hubble constant is unknown ; consequently, the exact age of the Universe can not be determined. By convention, timestamp 0000 0000 0000 is assumed to be the timestamp of the Big Bang.

If the universe is 13.84 years old, then the hubble Constant is: 70.66 km/s/Mpc.

Slide 16 Notes

Black hole Sagittarius A* appears to move (due to the orbit of the sun around the Milky-way) with a rate of six milli-arc-seconds per year. The motion is listed in Wikipedia as "approximately −2.70 mas per year for the right ascension and −5.6 mas per year for the declination" or a vector addition total of 6.22 milli-arc-seconds per year.

At this constant rate, Sagittarius A* would move six arc-seconds every thousand years. It would move six arc-minutes in 60 thousand years, or one arc-minute every 10 thousand years. It would move one degree every 600 thousand years, ten degrees every 6 million years, and 180 degrees every 108 million years. Unfortunately though, the motion is not constant, as the sun tends to drift up and down in an arm of the Milky Way as it orbits. Slide 16 uses an approximate value (106 million years) for the sun to orbit 180 degrees, not counting up and down drifting motion.