Stupid physics question

[wave killer]

Sorry if this is considered spam, but I'm kinda stuck on two questions that I need help with a story I'm writing; since time can speed up the farther away you are from a body of gravity and you were to travel to another earth like planet with life similar to humans on it several lights years away at the speed of light would that planet's time frame be the same as it is on earth's when you left it or it would it be different from Earth's by several years in the future?

And also what would happen if you dropped an amount of liquid metallic hydrogen on the surface of a neutron star? Like how long would the hydrogen last before the Neutron star ripped it apart or would the LMH be able to sustain itself?

[AuraTwilight]

Sorry if this is considered spam, but I'm kinda stuck on two questions that I need help with a story I'm writing; since time can speed up the farther away you are from a body of gravity and you were to travel to another earth like planet with life similar to humans on it several lights years away at the speed of light would that planet's time frame be the same as it is on earth's when you left it or it would it be different from Earth's by several years in the future?

When you're going THAT fast, only your own personal time is effected, so it's kind've like your aging slowed down. When you get to this other planet, it will be in the same time frame as the planet you left, but if you were to go back to Earth, it'd be the future.

Imagine you have a pair of 20 year old twins, and you sent one into relativistic space and one remained on Earth. After going super fast, and returning to Earth, you'd find that the twin you left on Earth has aged to be 30, and the one that went into space is....let's say 22.

And also what would happen if you dropped an amount of liquid metallic hydrogen on the surface of a neutron star? Like how long would the hydrogen last before the Neutron star ripped it apart or would the LMH be able to sustain itself?

I'm not that familiar with Liquid Metallic Hydrogen and Neutron Stars, so don't take this too seriously, but I'll take a crack at it. According to google, this would depend on the strength of the Neutron Star's magnetic field and the LMH's density. The most likely outcome is that the magnetic field wins out and the LMH is torn apart; and it would probably not last minutes.

[wave killer]

Sorry if this is considered spam, but I'm kinda stuck on two questions that I need help with a story I'm writing; since time can speed up the farther away you are from a body of gravity and you were to travel to another earth like planet with life similar to humans on it several lights years away at the speed of light would that planet's time frame be the same as it is on earth's when you left it or it would it be different from Earth's by several years in the future?

When you're going THAT fast, only your own personal time is effected, so it's kind've like your aging slowed down. When you get to this other planet, it will be in the same time frame as the planet you left, but if you were to go back to Earth, it'd be the future.

Imagine you have a pair of 20 year old twins, and you sent one into relativistic space and one remained on Earth. After going super fast, and returning to Earth, you'd find that the twin you left on Earth has aged to be 30, and the one that went into space is....let's say 22.

Okay, and this would also count for wormholes correct?

And also what would happen if you dropped an amount of liquid metallic hydrogen on the surface of a neutron star? Like how long would the hydrogen last before the Neutron star ripped it apart or would the LMH be able to sustain itself?

I'm not that familiar with Liquid Metallic Hydrogen and Neutron Stars, so don't take this too seriously, but I'll take a crack at it. According to google, this would depend on the strength of the Neutron Star's magnetic field and the LMH's density. The most likely outcome is that the magnetic field wins out and the LMH is torn apart; and it would probably not last minutes.

That makes sense; I thought the two would be nearly equal.

And one more thing; Are Exotic Matter and Antimatter the same thing or separate?

[Kuukai]

Actually that's wrong, since the odds of finding a planet in the same reference frame as Earth are infinitesimal, basically zero. Time will move at a different rate, just think of the planet as another spaceship. Also note that simultaneity doesn't exist--if event A on planet A and event B on planet B happen at the same time from one frame of reference, then from another equally valid frame A happens first and from yet another one B happens first. So time itself is a rather unintuitive concept and living on an extrasolar planet while remaining concerned with Earth would be even more annoying than timezones...

[shugo_lover]

Actually I thought time here was more of in the past. I remember something like a distant stars shineing takes like 4 years to reach earth so when you see it shine its actually in the past or something like that. I dunno dont listen to me thats just what I remember from class.

[Kuukai]

That's totally different. That can be explained by standard intuition. It's just like how thunder follows lightning. Lightning in turn follows the actual event by a little bit, since light isn't instantaneous.

[GamerKale]

I know Kuukai already explained this but sometimes things need to be said in different ways, me and another friend had to explain things from our astronomy class to another guy about three different ways before he got it, of course if you read what Kuukai said and get it don't bother with this paragraph. Here goes, planets are far more likely to be moving at different speeds through space than Earth or each other so time would seem to pass faster or slower on said planet than on Earth. But if you're writing a sci-fi story you can always fudge this if you feel it would serve the story better. Or you could do the exact opposite and make that an integral part of the plot.

As for accounting for wormholes, what do you mean?

Shugo once again reiterating here, the light from the star that we're seeing right now is four years old as for what the star is actually doing right now all we can do is hypothesize or as the prof. said, guess. A star may have died already but we're still observing the light it gave out long ago so we have no idea if it still shines or not.

And if memory serves Exotic Matter and Antimatter are different things. Exotic matter just doesn't function like normal matter in some regard while antimatter explodes or at least dissipates upon contact with normal matter can't remember which, either way they stop existing as far as we can tell once they hit regular matter.

[Kuukai]

Yeah, that's an important note. Although modern SF loves time dilation, they usually ignore the simultaneity-doesn't-exist part since it's basically antithetical to narrative. If anyone actually did pull it off, I'm sure it would hurt my head... @_@

[wave killer]

Yeah, that's an important note. Although modern SF loves time dilation, they usually ignore the simultaneity-doesn't-exist part since it's basically antithetical to narrative. If anyone actually did pull it off, I'm sure it would hurt my head... @_@

That's actually what I'm working on. But as you can see I'm still trying to get some basics worked out.

@Kale: For the wormhole thing I mean if somebody took a wormhole to one point in the universe that would take 30 million light years to reach regularly and used the same wormhole to return back their starting point would time still be the same when they left or would time have advanced another 30 million years from their time of departure?

And is there any idea on how to create Exotic matter or is their existence at all still in debate?

[Kuukai]

It probably depends on the model, after all wormholes are pretty theoretical, but generally it's thought that it would only take you the time needed to traverse the wormhole, so no, a round trip via a "useful" wormhole should only take a couple of minutes, if both areas are in the same reference frame. If they aren't, remember that time on one side will move more slowly relative to the other. So if you leave Earth through a wormhole to a destination moving close to the speed of light relative to Earth, then while you're messing around on the other side, decades could pass on Earth. Within the wormhole itself you wouldn't need to worry about that, as I understand it, it's only a problem upon exiting. Of course my highschool relativity is failing me, and I'm trying to solve in my mind the problem of time moving slowly on Earth instead when viewed from the destination's reference frame, seemingly contradicting all of this. Gah, hurts my head...

Lots of people speculate, for instance there was a wild theory that the LHC failed to produce the Higgs Boson because future successes sent particles (which I'm pretty sure had negative mass) back in time disrupting the experiment. We also don't know empirically that antimater has negative gravitational mass, since it annihilates before we can see it fall. I really don't know all that much about this, but Wikipedia says the Casimir effect can be used to produce a locally mass-negative region of space-time...

[wave killer]

It probably depends on the model, after all wormholes are pretty theoretical, but generally it's thought that it would only take you the time needed to traverse the wormhole, so no, a round trip via a "useful" wormhole should only take a couple of minutes, if both areas are in the same reference frame. If they aren't, remember that time on one side will move more slowly relative to the other. So if you leave Earth through a wormhole to a destination moving close to the speed of light relative to Earth, then while you're messing around on the other side, decades could pass on Earth. Within the wormhole itself you wouldn't need to worry about that, as I understand it, it's only a problem upon exiting. Of course my highschool relativity is failing me, and I'm trying to solve in my mind the problem of time moving slowly on Earth instead when viewed from the destination's reference frame, seemingly contradicting all of this. Gah, hurts my head...

As I figured. Thanks, and sorry for being a pain.

Lots of people speculate, for instance there was a wild theory that the LHC failed to produce the Higgs Boson because future successes sent particles (which I'm pretty sure had negative mass) back in time disrupting the experiment. We also don't know empirically that antimater has negative gravitational mass, since it annihilates before we can see it fall. I really don't know all that much about this, but Wikipedia says the Casimir effect can be used to produce a locally mass-negative region of space-time...

That sounds a lot like how Tachyons were used in Watchmen. I take it that theory hasn't been proven either has it?

This question should be easy for you: how is it that weak nuclear force and electromagnetic force were able to combine into the electroweak force?

[Kuukai]

I should really see Watchmen...

Hell if I know, but if I'm reading this right it's apparently just a quirk of nature that at low energy levels they behave as separate forces while at high levels they behave as the same force. I couldn't possibly explain the particle physics behind it, it's completely over my head... You can see for yourself on Wikipedia...

[wave killer]

I should really see Watchmen...

Hell if I know, but if I'm reading this right it's apparently just a quirk of nature that at low energy levels they behave as separate forces while at high levels they behave as the same force. I couldn't possibly explain the particle physics behind it, it's completely over my head... You can see for yourself on Wikipedia...

The movie was good but I never read the comic.

Thanks anyway, but I don't really trust wikipedia all that much when it comes to stuff like this. I'll just read some Michio Kaku books or something.

But thanks to those who posted, really needed for my web comic.

[AuraTwilight]

I should really see Watchmen...

Wait, you've never seen or read Watchmen? WTF, you of all people, I would've expected to.