1. ULTRA-amateur here.

but i was ruminating............

what if ALL matter is expanding?

we know the universe is, humans are getting taller as they evolve, etc......
if planets are expanding/getting bigger/"stretching" that would surely explain earthquakes, etc.
and hey, it's not like we've been comparing the diameter of the Earth every year lately.

so say, the space between atoms is increasing, planck length by planck length. every year (some force related to entropy?)...

either this has already been answered a few hundred years ago, or deemed too stupid to consider.

but i know nothing and would like a definitive answer.

2.

what if ALL matter is expanding?
humans are getting taller as they evolve, etc...
No. In fact, we're the same as many of our ancestors and shorter than others.
In recent times, human growth us due to the hormones in the food we eat.
Comparing human growth to the Universe' expansion is beyond far-fetched...
if planets are expanding/getting bigger/"stretching" that would surely explain earthquakes, etc.
and hey, it's not like we've been comparing the diameter of the Earth every year lately.
Actually we are and must. GPS and communication satellites require it. In addition to this, we have a pretty comprehensive theory on the Earth- well supported by a lot of observational evidence. The Earth is gaining slight mass, very slight, due to dust from space impacting the Earth every year.

But that is not Expansion of Matter.
so say, the space between atoms is increasing, planck length by planck length. every year (some force related to entropy?)...
but i know nothing and would like a definitive answer.
Nuclear force - Wikipedia, the free encyclopedia

what if ALL matter is expanding?
if all matter was expanding, then we would be expanding with it and possibly not be able to tell the difference

5. First we must answer the question "Does everything expand or only matter?".

6. Originally Posted by Neverfly
what if ALL matter is expanding?
humans are getting taller as they evolve, etc...
No. In fact, we're the same as many of our ancestors and shorter than others.
In recent times, human growth us due to the hormones in the food we eat.
Comparing human growth to the Universe' expansion is beyond far-fetched...
if planets are expanding/getting bigger/"stretching" that would surely explain earthquakes, etc.
and hey, it's not like we've been comparing the diameter of the Earth every year lately.
Actually we are and must. GPS and communication satellites require it. In addition to this, we have a pretty comprehensive theory on the Earth- well supported by a lot of observational evidence. The Earth is gaining slight mass, very slight, due to dust from space impacting the Earth every year.

But that is not Expansion of Matter.
so say, the space between atoms is increasing, planck length by planck length. every year (some force related to entropy?)...
but i know nothing and would like a definitive answer.
Nuclear force - Wikipedia, the free encyclopedia

7. Originally Posted by marnixR
what if ALL matter is expanding?
if all matter was expanding, then we would be expanding with it and possibly not be able to tell the difference
Is that because our rulers and measuring tapes would also be expanding?

(not intended to be taken seriously)

8. Originally Posted by seagypsy
Originally Posted by marnixR
what if ALL matter is expanding?
if all matter was expanding, then we would be expanding with it and possibly not be able to tell the difference
Is that because our rulers and measuring tapes would also be expanding?

(not intended to be taken seriously)
Yes.

(even taken seriously!)

ULTRA-amateur here.

but i was ruminating............

what if ALL matter is expanding?

we know the universe is, humans are getting taller as they evolve, etc......
if planets are expanding/getting bigger/"stretching" that would surely explain earthquakes, etc.
and hey, it's not like we've been comparing the diameter of the Earth every year lately.

so say, the space between atoms is increasing, planck length by planck length. every year (some force related to entropy?)...

either this has already been answered a few hundred years ago, or deemed too stupid to consider.

but i know nothing and would like a definitive answer.
This idea of matter getting larger was proposed by Paul Dirac in the early 30's when proposing his large numbers hypothesis. He proposed both the expansion of matter and the expansion of space to explain galactic redshifts, which was then a new discovery. Expanding matter falls into a class of theories called "Scaling Theory," where the scale of matter and other aspects of reality would accordingly change over time. Some of these models propose a cause for this changing of scale and other models do not. The flip side to this theory, is the dilution of matter model. Matter, according to these models, would accordingly be getting smaller as time progresses and would have been larger in the past. Hoyle/ Narlikar were the most well known proponents of this model. Larger matter in the past would have accordingly produced longer wavelengths of EM radiation, and accordingly would explain the observed galactic redshifts. These are cosmological models that are generally unrelated to Earth Science, but some that ascribe to these models, also assert evidence concerning continental configurations, geological evidence, the Earth moon relationship, the Earth Sun relationship, etc.

-- regarding both matter getting larger or smaller as time passes.

10. Originally Posted by SpeedFreek
Originally Posted by seagypsy
Originally Posted by marnixR
what if ALL matter is expanding?
if all matter was expanding, then we would be expanding with it and possibly not be able to tell the difference
Is that because our rulers and measuring tapes would also be expanding?

(not intended to be taken seriously)
Yes.

(even taken seriously!)
the only problem is, other physical constants like the speed of light or that of sound would have to change in step with the expansion of matter, otherwise there would be ways of telling whether something got bigger

11. Originally Posted by marnixR

the only problem is, other physical constants like the speed of light or that of sound would have to change in step with the expansion of matter, otherwise there would be ways of telling whether something got bigger
Yes, in some diminution of matter models all constants would remain constant in their own time frame, but some constants would appear to have been different when looking back in time. The speed of light, for instance, would appear to have been faster in the past while time would appear to have been slower (time dilation).

I imagine an expanding matter model might have similar contentions concerning constants remaining constant but I would expect opposite predictions concerning the appearance of distant galaxies and the distant universe.

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