Does this explain what generates gravity?

I know I know - but I have placed my bet and rest my case ;-D Even if I stumbled there for a moment, I'm now solidly back to the pulsating universe - like a slow heart, making a bang every 250By or soo... its so beautiful and it makes som much sense. Crunch-Bang-Crunch-Bang... too-too... here we come! This makes it the only perpetuum mobile in existence - very poetic.

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Andromeda looks to have merged with another member of our local group of galaxies in the past
It's interesting to consider what has gone on to produce our own locality let alone Andromeda and other members of the local group to produce what is their "now" in terms of elements that allow us to be even here.
Andromeda - quick web
Scientists think the galaxy could be anywhere from 5 and 10 billion years old. However, it may not have existed in its current form until two or three billion years ago, when two smaller galaxies orbiting each other merged to form the current Andromeda Galaxy, according to a 2018 study.
Bigger than ours - seems to be. Mass ???

Another
Most galaxies are between 10 billion and 13.6 billion years old. Our universe is about 13.8 billion years old, so most galaxies formed when ...

Then common galaxy shapes that appear to be retained to some degree
https://universe.nasa.gov/galaxies/types/
 
What are the chances of that happening again from nothing.

All theories of quantum gravity describe something physical that was going on in the early universe prior to the point at which our ordinary understanding of space and time breaks down.

However, that begs the question, where did that physical something come from?

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Roger Penrose's model for a cyclical universe is perhaps as good a guess as you'll get as to how the Universe has emerged from (almost) nothing:

https://www.bbc.com/future/article/20200117-what-if-the-universe-has-no-end

Penrose’s model predicts that much of the matter in the Universe will eventually be dragged into ultra-massive black holes. As the Universe expands and cools to near absolute zero, those black holes will “boil away” through a phenomenon called Hawking Radiation.

“You have to think in terms of something like a googol years, which means a number one with 100 zeros,” says Penrose. “That’s the number of years or more for the really big ones to finally evaporate away. And then you’ve got a universe really dominated by photons (particles of light).”

Penrose says at this point, the Universe begins to look much as it did at its start, setting the stage for the start of another aeon.
 
I want to know the answer to this question.

I gave the answer.

I researched the question a wee while back after remarking to my wife that time was passing so quickly.

When you are young you tend to be more active, doing lots of things and storing up lots of memories of what happened during the day - this makes the day seem to have passed slowly.

When you are old and retired like me, you may be less active, doing fewer things and storing up fewer memories of what happened during the day - this makes the day seem to have passed quickly.

EDITED for clarity!
 
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Roger Penrose's model for a cyclical universe is perhaps as good a guess as you'll get as to how the Universe has emerged from (almost) nothing:
Hawkin's radiation. A wiki definition

Hawking radiation is the theoretical thermal black-body radiation released outside a black hole's event horizon. This is counterintuitive because once ordinary electromagnetic radiation is inside the event horizon, it cannot escape. It is named after the physicist Stephen Hawking, who developed a theoretical argument for its existence in 1974.[1] Hawking radiation is predicted to be extremely faint and is many orders of magnitude below the current best telescopes' detecting ability.
Hawking radiation reduces the mass and rotational energy of black holes and is therefore also theorized to cause black hole evaporation. Because of this, black holes that do not gain mass through other means are expected to shrink and ultimately vanish.

For all except the smallest black holes, this happens extremely slowly. The radiation temperature is inversely proportional to the black hole's mass, so micro black holes are predicted to be larger emitters of radiation than larger black holes and should dissipate faster per their mass. As such, if small black holes exist such as permitted by the hypothesis of primordial black holes, they ought to die the fastest the smaller they shrink, leading to a final cataclysm of high energy radiation alone.[2] Such radiation surges have not been detected as of yet.
 
When you are young you tend to be more active, doing lots of things and storing up lots of memories of what happened during the day - this makes the day seem to have passed slowly.

When you are old and retired like me, you may be less active, doing fewer things and storing up fewer memories of what happened during the day - this makes the day seem to have passed quickly.

Thank you for your answer. I'm not sure it reflects my personal experience though. I'm pretty active and every day has nowhere near as many hours in it to accomplish what I need to do. I do move much slower now of course. But I keep moving and routinely do 6 mile walks, which takes two hours. I'm still learning stuff and honestly meeting more people than when I was in high school, but attending a lot of funerals too.

I distinctly remember summer break from primary school (10 weeks I think) being a really long time. Now 10 years isn't really that long. That's the cruel irony.

10 weeks is 2.5% of an 8 year old's life. It's about 0.3% of my life to date. (Math nerds correct me I did it in my head.) Yet it's 2-3% of my remaining lifespan if I'm lucky. I could be wrong.
 
I gave the answer.

I researched the question a wee while back after remarking to my wife that time was passing so quickly.

When you are young you tend to be more active, doing lots of things and storing up lots of memories of what happened during the day - this makes the day seem to have passed slowly.

When you are old and retired like me, you may be less active, doing fewer things and storing up fewer memories of what happened during the day - this makes the day seem to have passed quickly.
That may by why for you, but I'm with GK on this - busier than ever, and I think it's just a % game, a year is a much smaller part of your total timespan.