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- What is the recession speed, today, of the matter which created the CMBR?

Also, roughly how long would be before we can start to detect a shift in the CMBR microwave frequency due to greater redshift?

Hello, I am talking to a Quantum Mechanics Physicist friend who is having a hard time accepting some of the Cosmology theories and numbers and I want to be sure that my numbers were correct.

1. Firstly, what is the recession speed, today, of the matter which created the CMBR?

I told him that it 1091.6 times the speed of light. 1091.6 being the red shift.

2. What is the maximum distance to matter today whose radiation can still reach us, if it was emitted today? Is it the event horizon 16Byrs given in this link?

https://explainingscience.org/2021/...8LSmVnb_8X2DePizAXERLBom-kshA1xcxtwmt6u9TIYD0

3. Is there a final limiting value for the radius of the Observable Universe, or according to the standard model does it always continue to get smaller and smaller? Ethan here say 100B years from now even the closest galaxy will be unobservable:

https://www.forbes.com/sites/starts...ve-background-ever-disappear/?sh=30c192cb40e0

4. Also, roughly how long would it be before we can start to detect a shift in the CMBR microwave frequency due to increasing redshift? I was just looking for an estimate, it will depend on instrumentation accuracies, but we do have a lot of time for averaging!

Thanks!

1. Firstly, what is the recession speed, today, of the matter which created the CMBR?

I told him that it 1091.6 times the speed of light. 1091.6 being the red shift.

2. What is the maximum distance to matter today whose radiation can still reach us, if it was emitted today? Is it the event horizon 16Byrs given in this link?

https://explainingscience.org/2021/...8LSmVnb_8X2DePizAXERLBom-kshA1xcxtwmt6u9TIYD0

3. Is there a final limiting value for the radius of the Observable Universe, or according to the standard model does it always continue to get smaller and smaller? Ethan here say 100B years from now even the closest galaxy will be unobservable:

https://www.forbes.com/sites/starts...ve-background-ever-disappear/?sh=30c192cb40e0

4. Also, roughly how long would it be before we can start to detect a shift in the CMBR microwave frequency due to increasing redshift? I was just looking for an estimate, it will depend on instrumentation accuracies, but we do have a lot of time for averaging!

Thanks!