What is the Universe expanding into..

[Disco-Pete]

After supper? 😉

 

[Galu]

I've been looking back over this thread and there have been many informative discussions about the expansion of the universe and related science topics.

I'd like to see us continue to concentrate on space science and to keep ourselves informed about all the latest developments.

Disco-Pete, I've no idea what you mean by "After supper?", are you referring to Steve's post?

Pete, it is you who has instigated many of the informative discussions on this thread and I do hope you will continue to do so to its betterment.

 

[Disco-Pete]

Well, I'm not quite sure what you may be alluding to Galu but rest assured the thread will continue it's course as before you began contributing unless an unforeseen querk appears to change the standard of course. As always, thank you kindly for your thoughtful mention.

 

[system7]

Can't see a Thread about Gravity spoiling our musings, frankly. Dead-end Physics IMO. 😀

I was watching Professor Brian Cox yesterday. Very interesting Scale of 10 journey to the edge, or is it centre, of the Universe. I calculated that by the time we get beyond The Moon, we are already travelling beyond the speed of Light.

How big is our Universe? | Brian Cox - BBC Ideas

Anyway, only 7 minutes, and just sit back and watch. Oh, and Goodnight. 😉

 

[Galu]

Why Aren't Scientists More Skeptical Of Dark Matter?

Either scientists have got the rules wrong, and they need to be modified, or something else is at play above and beyond what they’d considered earlier.

Yet, when it comes to the observed fact that gravity does not affect the matter we can see in the Universe in the way predicted by the theory of General Relativity, most scientists don't consider altering the theory, but introduce Dark Matter to explain the observations.

So, is there really a missing ingredient (Dark Matter) which accounts for the gravitational discrepancies, or does our theory of gravity break down on larger cosmic scales and have to be modified (Modified Newtonian dynamics or MOND).

Let's ask Ethan for the full story! Why Aren’t Scientists More Skeptical Of Dark Matter?

 

[Galu]

Well, I'm not quite sure what you may be alluding to Galu...

You must have not seen my edit, Pete.

To be clear, what were you referring to by the non-sentence "After supper"? 😕

 

[Disco-Pete]

I defer to System7. 😀

 

[egellings]

Maybe it's better to log on to a site that specializes in astronomical topics rather than audio ones. This site is about all things audio, not astronomy.

 

[Bonsai]

This is the lounge and this is a great thread to explore science. Most of us have audio stuff going on in side threads.

🙂

 

[Galu]

The Lounge - A place to talk about almost anything.

I don't know enough about astronomy to play with the big boys.

I'm here to learn and to share in a friendly, amateur environment. 😎

 

[KaffiMann]

Or perhaps:
If all the people on earth did a simultaneous 100m dash in the same direction...

There would be no detectable effect on Earth’s rotation because the mass of the people is so much less than that of the planet.

The mass of planet Earth is about 10 trillion times the mass of all the people on it.

Anyway, the force to stop running would simply cancel out the force to start running!

That's the boring answer Galu.

I was thinking that the individual accelleration and speed of each person would be highly variable based on a large number of things like age, fitness, illness +++. Some might even require some form of motorized transportation device to complete a full 100m worth of "relatively rapid movement". There would probably also be a difference in effect pending on where on this ball each person is placed, and some would have a slower rate of accelleration/decelleration than others.
Just fun to picture every single person here on this ball trying to syncronize a 100m dash at the same time, think of the massive discussions it would bring. We would probably get some "this seems like fun pro-100m dash" groups hopelessly defending against a myriad of perhaps flat-earth believing "anti 100m dash because it's the devil incarnate" groups.
Okay, I can see myself making a long post about this, so...

The moon is about 73 477 peta tons, whereas the worlds population is about 287 million tons.

Technically, the moon does not weigh anything, because it freefalls through orbit.

Well, *duh*... Maybe they took notes from you, Galu?
It most definitely has mass, so therefore it must have weight.

Its mass is one sixth of the size of the earth, and it’s estimated that it would weigh 73,477,000,000,000,000,000 tons, if it was resting on the surface of the earth.

Weight Of Moon - What Things Weigh
But the moon is influencing this ball from a distance through gravity of mass, we are mass on the surface of the ball, would it not require less to make a measurable impact?
The Moon is constantly facing the same side towards Earth, because of an imbalanced iron core that makes it function somewhat like a giant compass needle. I suspect that just loosing a little bit of that iron would result in the moon having drifted far away a long time ago.

Hard to avoid letting the mind roam, so I'll just stop there.

How much does the Earth and its population weigh?

Anyway, another interesting tidbit from that article would be:

Here’s an interesting fact: the planet is losing more mass than it gains. Every day dust, comets, and meteors breach the atmosphere and land on Earth, adding to its mass. At the same time, mass is lost as gases escape our atmosphere. According to Dr Chris Smith, a medical microbiologist and broadcaster who tries to improve the public understanding of science, every year the planet adds 40,000 tonnes of mass from space dust, but loses 95,000 tonnes of hydrogen and 1,600 tonnes of helium. That’s a net loss of 50,000 tonnes each year or 0.000000000000001%. Not to be worried though. It would take trillions of years for all the hydrogen on the planet to get depleted but we can’t the same about our helium resource. Some have cautioned the world could run out of helium in the next three decades at the current rate we’re squandering it.

Comments on that, Steve?

To be clear, what were you referring to by the non-sentence "After supper"? 😕

What? I think that was a perfectly valid sentence, perhaps a bit hard to decipher the intended recipient and/or context, but I see no apparent fault with the sentence in itself.

Maybe it's better to log on to a site that specializes in astronomical topics rather than audio ones. This site is about all things audio, not astronomy.

I have been wondering why there seems to be a minor influx of comments like this, perhaps it would be because most members are not aware of our wonderfully casual Lounge?
All work and no play...

This is the lounge and this is a great thread to explore science. Most of us have audio stuff going on in side threads.

🙂

Yeah, I'm (somewhat desperately) hoping to get more time for my audio related stuff maybe in January...

 

[Galu]

Technically, the moon does not weigh anything, because it freefalls through orbit.

You are correct to question that statement, KaffiMann.

If we define weight as the force of gravitational attraction towards the centre of the Earth, then the Moon most definitely has weight.

It is this centre-seeking or centripetal force that keeps the Moon in its orbit and prevents it flying off into space in a straight line.

I think that was a perfectly valid sentence.

You are incorrect to question my statement that "After supper" is a non-sentence.

I didn't excel in English class at school, but I did learn that a sentence must have a verb in it, and it must make complete sense all on its own.

For example, "I go to bed after supper." is a sentence. 😉

 

[system7]

I used to hang around a Professional Physics Forum. I was in my String Theory Phase. I know, I was young.

Had watched Prof. Susskind's lectures and it all made perfect sense to me. Took a lot of Flak from the Standard Model people. Decided it was a waste of time arguing with such stick-in-the muds. 😀

But did conclude that spherical dome (Morel CAT 298 and all that) tweeters were broken, and (Vifa XT25 and SB Ring radiators) toroidal types far better. This forum gave me a lot of Flak too. Funny thing is most of it came from people who had bought spherical soft-dome tweeters. I said they must be cloth-eared! It's String Theory, innit? 😱

 

[Galu]

The Moon is constantly facing the same side towards Earth, because of an imbalanced iron core that makes it function somewhat like a giant compass needle.
I suspect that just loosing a little bit of that iron would result in the moon having drifted far away a long time ago.

Hard to avoid letting the mind roam, so I'll just stop there.

Like Harry Lauder, you certainly like Roamin' in the Gloamin'! 😀

Harry Lauder | Roamin' in the Gloamin' - YouTube

Here's the true explanation: Tidal locking - Wikipedia

 

[richb]

Is Roger Penrose still banging on about his Conformal Cyclic Cosmology (CCC) hypothesis?

Yes he is! I recently attended (online as it was sold out) a talk by him at Southampton University (UK), this was his lovely slide demonstrating the idea

 

[Galu]

Someone's been following this thread!

Thanks richb! 😎

 

[system7]

I am the expert in conformal transformations, as is well known.

Even a Child of Ten knows there are 24 hours in the Day. I don't know why anyone would make it more difficult. 😕

Anyway, at last, NEW PHYSICS! 😀

I was right all along. Even Ethan Siegel agrees with me.

The Koide Formula is exciting new interest. 😎

Could This 40 Year Old Formula Be The Key To Going Beyond The Standard Model?

Ever wondered about all that 1/3 and 2/3 charge business. Ever wondered why 3 generations of particles have particular masses? As I have. It's all coming true.

I have been busy calculating, as usual. Get the root Lepton masses around 1 : 14.38 : 58.96 ratio. Regular Electrons and Mu's and Tau's and all that. Even works with neutrinos and Quarks.

It's starting to look like Mr. Cal Weldon's sort of Geometric Puzzle that we enjoy.

 

[Galu]

Would you care to explain Ethan's article in words that a "Child of Ten" would understand?

Mathematically, I'm even struggling with the following extract! 😱

By taking the sum of any three numbers, while simultaneously dividing them by the square of the sum of each of their square roots, you’ll always get a number between 1/3 and 1, without exception. When all three numbers are equal, you get 1/3; if one number is much, much greater than the other two, you get 1. In the Standard Model, we have precisely three generations of fermions. So why is it, then, for both the charged leptons and the three heaviest quarks, that we get a value precisely between those two: of 2/3, while the light quarks give 5/9 and the massive bosons give us a value just a tiny bit larger than 1/3?
At this point, we have no idea.

Could This 40 Year Old Formula Be The Key To Going Beyond The Standard Model?

 

[system7]

I see Wiki is posting this diagram too:

Koide formula - Wikipedia

It is WRONG! The Ratios are wrong. 🙄

As WRONG as this other one on Jupiters moons:

The Moons actually have a 1:2:4 ratio around the perijove of Io. So are precessing too.

The Chap for the Koide Formula is Carl Brannen:

Brannen Works

Though more particles have been included lately. Higgs, W and Z bosons is a bit of a stretch to my mind though. Very different animals.

What I was trying to convey here, is there is a triangular symmetry in the Koide Formula, offset by an angle of 2/9 Radians from the real axis for reasons best known to the Universe. 1/3 and 2/3 and 5/9 are OK too. If the ratio is not exact, it may be because we neglect some Quantum Effects, in which Rest Mass doesn't exist exactly as we think. Nothing is ever at rest.

 

[KaffiMann]

Here's the true explanation: Tidal locking - Wikipedia

To my mind, that's equal to the medical phenomenon of treating the symptom because the doctor does not have time to find the cause.
The tidal locking is a result, cores are offset: more iron towards the gravitational pull.

Tidal locking is more a symptom rather than the cause.

Regarding your views on sentence structure, it's not a rule, merely a general guideline.

What is a verb?
Verbs are words that show an action (sing), occurrence (develop), or state of being (exist). Almost every sentence requires a verb.

Verb | Definition of Verb by Merriam-Webster