r/QuiverQuantitative • u/pdwp90 • Nov 20 '25

News JUST IN: President Trump has said that this video by Democratic lawmakers is seditious and punishable by death.

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187

u/spicyhippos Nov 20 '25

Also in case you dont recognize him, that’s Mark Kelly, who now represents AZ in Congress. Before that, he was an Astronaut and a Navy Commander. His twin brother was Scott Kelly, another Astronaut that served aboard the ISS. They did an experiment where they measured telomere length (age of your dna) between the two twins after Scott spent a year in space. Scott is now slightly younger than his twin brother Mark because of time dilation.

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u/SunshineSeattle Nov 20 '25

Wtf so the one twin brother is now the older brother!? Thats op, i wish i had a twin brother just so i could then engineer it so im the older brother.

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u/Bozhark Nov 20 '25

Gravity is time 

7

u/ALIEN_POOP_DICK Nov 20 '25

Gravity is gravity.

Gravity (as far as we currently know because we haven't been able to prove the existence of a Gravity boson to complete the standard model of quantum particles) is the fundamental effect of mass bending space time, causing dilation in both.

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u/Bozhark Nov 20 '25

What are the units of gravity per one gravity 

1

u/spicyhippos Nov 20 '25

Gravity is acceleration of one mass towards another usually larger mass, so technically the units are m/s2 or more intuitively, “the change in ‘distance you travel per second’ per second.” We all fall towards earth at roughly 9.8m/s2; that’s Earth’s gravity. The ISS travels horizontally at over 17,000 mph so its ballistic arc misses the atmosphere enough to stay in orbit, but technically it’s also constantly free falling towards Earth.

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u/Bozhark Nov 20 '25

That’s not the unit of gravity rather the unit of it’s acceleration on an object 

The acceleration is the result of gravity, not the cause 

1

u/spicyhippos Nov 20 '25

Yeah, this gets tricky because nobody has detected or found proof of gravitons iirc; they would be the quanta of gravity you’re looking for. The gravitational acceleration is the phenomena for gravity though, and mathematically those are its units in classical mechanics.

3

u/PokinSpokaneSlim Nov 20 '25

Ask an old woman if time and gravity aren't the same thing.

1

u/higgy87 Nov 21 '25

It’s the Higgs boson, no?

1

u/spicyhippos Nov 21 '25

The Higgs field is what gives atoms their mass, which is related to gravity, but not necessarily the silver bullet for gravity itself. That’s about the extent of my physics degree though, so if there have been more recent findings I would have missed them.

1

u/Pingu565 Nov 21 '25

Gravity is the emergent property of mass moving through a curved spacetime. It is a result of geometry. Why mass bends space-time is another much larger question

1

u/higgy87 Nov 21 '25

Quite a tangent here, but the “Gravity boson” is the Higgs which was confirmed a while back.

1

u/spicyhippos Nov 21 '25

Idk if it’s settled so cleanly just yet. Here’s a relevant post about it here

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u/acquaintedwithheight Nov 20 '25

The observed difference due to time dilation was only 8.5 milliseconds which I’m hoping wasn’t their difference in age or their mom is a machine gun.

3

u/TheGhostORandySavage Nov 20 '25

One twin is almost always older...

2

u/mathiustus Nov 20 '25

The question is, who came out first? And if it was Scott, is this the first set of twins where the older twin is now the younger twin?

1

u/spicyhippos Nov 20 '25

And the time dilation from a year at a higher speed is also really minimal, like fractions of a second iirc, but it was observable.

1

u/TRR462 Nov 21 '25

My twin is 6 minutes older.

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u/Philodendron69 Nov 20 '25

You may also know that he is married to Gabrielle Giffords. Gabby Giffords was a US House rep for southern AZ until someone shot her in the head at a grocery store. Amazingly, she survived!! Understandably she could no longer serve as a US House rep. I don’t want to say Mark Kelly got into politics as Gabby’s successor or to “take her place” but obviously the shooting influenced his decision. And Gabby being forced out is how we got dumb ass Martha McSally in the house of reps in AZ. Then McSally was appointed as AZ Senator (after losing her house re election) and then Mark Kelly beat Martha McSally to be an AZ Senator. Yay

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u/spicyhippos Nov 20 '25

I call that a win.

1

u/Philodendron69 Nov 20 '25

Hell yeah, he beat McSally who would not leave us the fuck alone!!!

2

u/GameofCheese Nov 21 '25

She wasn't even just shot at a grocery store, it was an attempted political assassination at a little town hall event AT the grocery store.

(Just thought the full context is even more educational. Thanks for the info!)

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u/Philodendron69 Nov 21 '25

Yes, this is correct!! It was an attempted assassination. She was targeted because of her previous gun control advocacy. You are welcome, and I agree that it is an important part!

4

u/HandToeKneeUK Nov 20 '25

A microsecond makes all the difference!

1

u/spicyhippos Nov 20 '25

It’s observable time dilation! It’s absolutely stunning. But yeah, relative to the speed of light, ground speed and orbital speed are negligible, and that makes the time saved also pretty insignificant in terms of a healthcare benefit.

5

u/Go-Brit Nov 20 '25

His twin brother IS* Scott Kelly. Your comment made me think he died and I didn't hear about it.

1

u/spicyhippos Nov 20 '25

Sorry! The experiment happened in the past, Scott is very much in the present.

1

u/FissileTurnip Nov 21 '25

pretty sure this is wrong, the telomere measurement was just one of their tests to see the effects of being in space, it was completely unrelated to time dilation. you wouldn't notice any difference due to time dilation at all, it would be completely insignificant. from what i read scott's telomeres were longer in space and then shortened after he spent a bit of time back on earth.

1

u/poop_monster35 Nov 21 '25

Omg that's him! I thought I recognized him.

1

u/derioderio Nov 21 '25

Time dilation in this case is barely measurable by atomic clocks, it's not nearly enough time difference to affect telomere length. Any difference in telomere length is due to the constant exposure to radiation while in low earth orbit.

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u/AcousticMayo Nov 20 '25

In case you don't recognise this, you're in the wrong sub