Determining Age of Universe w/ Hubbles Constant

In summary, the age of the universe can be determined using Hubble's Constant, which is currently valued at 71km/s/Mpc. To calculate the Hubble time, which is the time since the Big Bang, you can use the formula T=1012/H, where H is the Hubble constant. This results in a value of approximately 14 billion years when H = 71. As the universe expands, the Hubble constant decreases, meaning the age of the universe increases. To calculate the age of a particle at the outermost edge of the universe, you can use the formula X/V, where X is the current radius of the universe and V is the velocity, which equals H*X. Thus, the age of
  • #1
radius
10
0
Please can somebody explain how the age of the universe can be determined using Hubbles Constant?
If the constant is taken as 10km/s (just for the sake of easiness), how can this be figured out using calculations?

I appreciate any help!:smile:
 
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  • #2
the current value of Hubble constant is 71km/s/Mpc,now if you want to calculate the Hubble time, that is the time that have passed since Big bang, you do:
T=1012/H
where H is the Hubble constant, the result gives the Hubble time in years. If I put 71 in H, if gives 14 billion of years
From the formula you can see that the Hubble constant diminish in value with time, as the Hubble time augments
 
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  • #3
From the center of universe when you look the outer most particle the velocity will be

v=H*X ---- X - Current radius of universe.

So the time of that particle to reach there(age of universe) is

X/V

Which is 1/H

That's it.. Age of universe is Inverse Of H..
This is the most silliest way of explaining it..
 

1. How does Hubble's Constant help determine the age of the universe?

Hubble's Constant, also known as the Hubble-Lemaître constant, is a measure of the rate at which the universe is expanding. By using this constant and other observational data, scientists can calculate the age of the universe.

2. What is the current estimated age of the universe using Hubble's Constant?

Based on the latest observations and calculations, the current estimated age of the universe using Hubble's Constant is approximately 13.8 billion years.

3. How accurate is the age of the universe determined by Hubble's Constant?

The accuracy of the age of the universe determined by Hubble's Constant is constantly improving as new data and technology become available. Currently, the margin of error is estimated to be around 100 million years.

4. Can Hubble's Constant be used to determine the age of the universe in the past and future?

Yes, Hubble's Constant can be used to estimate the age of the universe at different points in time. By measuring the expansion rate and using other data, scientists can calculate the age of the universe at various intervals in the past and future.

5. How does the value of Hubble's Constant affect the estimated age of the universe?

The value of Hubble's Constant is directly related to the estimated age of the universe. A higher value would indicate a faster expansion rate and therefore a younger age, while a lower value would suggest a slower expansion rate and an older age. This is why accurate measurements of Hubble's Constant are crucial in determining the age of the universe.

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