Quiz about FTL galaxy observations

[Helio]

Here's a question I have that may help with understanding how light emissions from galaxies can reach us even though they are moving away from us (carried by space) faster than the speed of light.

If you can throw a snowball at 40 mph and a bus passed by you at 50 mph, can you throw ever hit the bus if you throw it after the bus has passed? [You are allowed to have others in the snow doing things around you.]

 

[billslugg]

False premise. We cannot see light emitted by galaxies moving away from us FTL. As they get farther away and move faster and faster they turn red, then infrared, then radio waves of longer and longer wavelength. Once they are going the speed of light all we see is black. At FTL speeds we also see nothing.

 

[promytius]

We will see them because the light from the time their speed/distance became unviewable has not reached us yet; otherwise we'll never know about any further away/faster moving galaxies.

 

[Classical Motion]

A spot at FTL might be blind, but a long enough length might interact long enough with sideways light for to see. A large collector. Radial light sources, should have some duration at fly by.

 

[Helio]

False premise. We cannot see light emitted by galaxies moving away from us FTL. As they get farther away and move faster and faster they turn red, then infrared, then radio waves of longer and longer wavelength. Once they are going the speed of light all we see is black. At FTL speeds we also see nothing.

That would be true if it were a Doppler model. It’s not. Hence the “cosmological redshift” describes it.

At only ~ z=1,4 galaxies are moving from us faster than light, though being carried by space. The CMBR is at z=13.8. The CMBR is receding at 1,090x the speed of light.

Here is Ned Wright’s calculator revealing details.

 

[George²]

All of these arguments make some sense only to those who accept that the universe originated with a big bang.

 

[stanwaterman]

All of these arguments make some sense only to those who accept that the universe originated with a big bang.

How else do you think? With a little bang or goddidit?

 

[Helio]

All of these arguments make some sense only to those who accept that the universe originated with a big bang.

Yes. I’m addressing a difficult concept that is mainstream for an expanding space (BBT). Namely, that light, once emitted, travels into inertial frames that progressively are moving slower and slower relative to Earth. Thus, a FTL galaxy’s light travels into regions moving slower than the FTL region, allowing light to reach us.

Throw a 40 mph snowball to a friend traveling in a 30 mph car, who subsequently throws it at 40 mph toward the bus and it will then hit the bus.

 

[SMyers]

Here's a question I have that may help with understanding how light emissions from galaxies can reach us even though they are moving away from us (carried by space) faster than the speed of light.

the simplest answer is that the standard model of cosmology is completely wrong and that galaxies are not expanding faster than the speed of light, which violates the laws of physics and is utterly ridiculous.

the only reason you ask this rhetorical question is because it is based in the Standard Model. the standard model being wrong makes the entire question moot.

but again, it does inspire reams of creative mental gymnastics to come up with an answer to a non-sensical question.

so my answer to this question is: it is not a valid question.

 

[Helio]

the simplest answer is that the standard model of cosmology is completely wrong and that galaxies are not expanding faster than the speed of light, which violates the laws of physics and is utterly ridiculous.

the only reason you ask this rhetorical question is because it is based in the Standard Model. the standard model being wrong makes the entire question moot.

but again, it does inspire reams of creative mental gymnastics to come up with an answer to a non-sensical question.

so my answer to this question is: it is not a valid question.

Yes, the purpose of this quiz does not support imaginative alternatives to mainstream cosmology.

But BBT is open to falsification, but please attemp to do do elsewhere.