EjmMissouri - very nice. The expanding universe depends upon the Hubble constant - more reports appearing that H0 may be having a fit
"A crisis in cosmology: New data suggests the universe expanding more rapidly than believed", ref -https://phys.org/news/2019-10-crisis-cosmology-universe-rapidly-believed.html. Some claims for H0 now suggest a universe about 11.5 billion years old, according to the Big Bang model interpretation. H0 has not behaved well over the years folks, at least past report suggest this to me
From some notes I keep in my home database - [The Hubble time measures the age of the universe since the Big Bang, using the Hubble constant. The larger the Hubble constant, the less time that elapsed since the Big Bang and the younger the universe must be. How old is the universe according to the Hubble constant?
Quick history: (A.) Edwin Hubble is credited with discovering the expanding universe from galaxy red shifts in the 1920s. The result was the Hubble constant which attempts to measure the rate of expansion of the universe.
(B.) In the 1930s, the Hubble constant pointed to a universe that started its expansion about 1E+9 years ago. This contradicted what astronomy was teaching about "the development of individual stars and systems of stars takes considerably longer. It is in no way known how this incongruity is to be overcome." Ref: Relativity, The Special and The General Theory, Albert Einstein, Crown Publishers Inc., 1961, p. 134.
(C.) In the 1940s and early '50s, not much better, about 1.8E+9 years old universe. Problem with this situation was that radiometric dated rocks were at least 3 billion years old and in 1955, the age of the earth was established at 4.56 billion years old. An error was discovered in measuring galaxy distances based upon Cepheid variables (galaxies much farther away than had been thought). The age of the universe increased to at least 5E+9 years old. Ref: "The Evolutionary Universe" by George Gamow, Scientific American, September 1956. Reprinted in New Frontiers in Astronomy, W.H.Freeman and Company, 1975, p. 320.
(D.) Today the Hubble constant points to a universe in the range of 8E+9 <= universe age <= 16E+9 years old. This would be the Hubble time. Based upon my readings, the most popular value for the Hubble time is 13.7/13.8E+9 years old according to publications today. The age of the Milky Way galaxy is 10E+9 <= age <=11E+9 years old.]