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LSulayman
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Why does t=1/H (hubble constant) indicate that that is the age of the universe?
LSulayman said:Why does t=1/H (hubble constant) indicate that that is the age of the universe?
LSulayman said:Why does t=1/H (hubble constant) indicate that that is the age of the universe?
Garth said:Strange that the age of the universe should be equal to Hubble Time to within an error of 0.6%, almost as if the universe had been expanding linearly, i.e. at the same rate, all the way along!
LSulayman said:But the fact that you are able to measure the age of the universe is evidence for a universe that is expanding, am I right?
marcus said:So the 13.7 billion years is really the "age of expansion", not the age of the universe itself.
LSulayman said:I don't really understand what you mean with that last sentence.Garth said:Strange that the age of the universe should be equal to Hubble Time to within an error of 0.6%, almost as if the universe had been expanding linearly, i.e. at the same rate, all the way along!
Garth
Garth said:In the standard cosmological LCDM model the universe is thought to have first decelerated, then accelerated explosively (Inflation), then decelerated, then accelerated (since a time where z ~ 1).
So what has been the result of this deceleration/acceleration process on the age of the universe?
The present best accepted values of cosmological parameters
(using the table at WMAP Cosmological Parameters)
H0 = 70.4 km/sec/Mpsc
[tex]\Omega_{\Lambda}[/tex] = 0.732
[tex]\Omega_{matter}[/tex] = 0.268
Feeding these values into Ned Wright's Cosmology Calculator:
The age of the universe is = 13.81 Gyrs.
But with h100 = 0.704,
Hubble Time = 13.89 Gyrs.
Strange that the age of the universe should be equal to Hubble Time to within an error of 0.6%, almost as if the universe had been expanding linearly, i.e. at the same rate, all the way along!
Garth
Garth said:Strange that the age of the universe should be equal to Hubble Time to within an error of 0.6%, almost as if the universe had been expanding linearly, i.e. at the same rate, all the way along!
Garth
The current estimated age of the universe is approximately 13.8 billion years old. This is based on observations and data from various scientific fields, including cosmology and astronomy.
Scientists use a variety of methods to determine the age of the universe, including measuring the expansion rate of the universe, studying the cosmic microwave background radiation, and analyzing the composition and distance of celestial objects.
t=1/H is the equation used to calculate the age of the universe based on the Hubble constant, which is the rate at which the universe is expanding. This equation is important because it takes into account the expansion of the universe over time.
Yes, the estimated age of the universe has changed as our understanding and technology have improved. Early estimates placed the age of the universe at around 10-20 billion years, but with advancements in scientific research, the current estimate is more precise at 13.8 billion years.
While scientists have determined an estimated age for the universe, it is not possible to determine the exact age with 100% certainty. This is due to limitations in our understanding and technology, as well as the ever-changing nature of the universe.