/sci/ - Science & Math

>>4191744
>Dyson sphere
>magic
We'll let you know.
>>>/x/

A dyson sphere would, at this point, be magic, and as such, we ain't gotta explain shit.

>>4191760
>>4191745
Why do you say that?

The weight of the sphere would be countered by the pressure of the star's light and wind. It would literally float above the star.

>>4191776
Hmm, last I checked, I heard the position of a Dyson sphere is not stable.

fizx, the mass of a dyson swarm can be just about anything, from the mass of a medium asteroid to more than the mass of all the planets in the system.

It just depends on how much work you're willing to put in, what kind of individual energy needs the cells have, what kind of latency you want for the system, how good of a control system you can build, and of course, what you want the swarm to actually do.

Remember, the classical swarm that orbits at one AU from the primary is not the only size possible.

>>4191744
The Ringworld hard sci-fi series by Larry Niven is roughly basically a cross-section of a Dyson sphere and has had a good number of calculations done on it, but the only one I remember off the top of my head is that the binding force of the material needed to hold together a Ringworld / Dyson sphere that was doing a complete rotation in 24 hours is on the order of magnitude of strong nuclear force

>>4191789
What do you mean by "the position of a Dyson sphere"?

>>4191811
We should be able to narrow down the the possible materials and dimensions of a Dyson sphere to what would be relatively practical and efficient.

>>4191849
Gravity is neutral, so it will invariably drift into the star if that's the only thing we're taking into account. Also, released particles aka solar wind will exert a force that goes 1/R^2 just like gravity, so it also will be neutral, so again I see nothing to keep it a set distance from the star. It will invariably drift in one direction, and eventually hit the star.

>>4191860
That is me.

I don't know why my trip wasn't in the Name field.

>>4191860
>What do you mean by "the position of a Dyson sphere"?
The forces acting on the Dyson sphere from the star are a net 0, so it will drift through space, inevitably hitting the star.

>>4191864

What if it's "orbiting" the star?

>>4191864
>It will invariably drift in one direction, and eventually hit the star.
But you just explained why it wouldn't fall into the star, the pressure of solar output.

The materials and technology available today are insufficient to create and maintain a Dyson Sphere in any way, shape or form.

What is a "Dyson sphere"?

>>4191893
Correction, we don't have the MEANS of doing it, but we should be able to figure out how it COULD be done.

>>4191898

Man-made hollow sphere surrounding a star.

>>4191898
A sphere that encompasses a star, created to harness the power of the star.

>>4191916
Why would anyone do that? There are more efficient ways!

>>4191898
http://en.wikipedia.org/wiki/Dyson_sphere

>>4191882
>>4191888
Again, as explained, unless I'm missing something fundamental, the solar pressure exerts a force that has the same structure as gravity. The force diminishes at a rate of 1/R^2, and thus the force of the solar pressure ought to be a net 0 over the whole Dyson sphere, just like gravity.

>>4191864
You can you some sort of thrusters to hold them in balance and being a ring you can just move it in another position so that it will avoid sun flares.

>>4191946
I'm merely noting that one of the bigger problems is that people automatically assume that a Dyson sphere can be "in orbit". It's not. It's free floating.

I'm not sure that the gravity and solar wind would equal each other unless at a VERY specific range from the star. And then, they would both change frequently, so it would be very difficult to keep it in a stable orbit. But I guess that's really only if you are talking about an actual sphere. It could just be like a Dyson C resent.

>>4191966
You don't understand.
http://en.wikipedia.org/wiki/Shell_theorem

>>4191923
More efficient ways to harness the power of a star? Like what?

>>4191926
Yes, it would be a NET zero, but the net force of air pressure on the internal surface of a balloon is zero and yet it doesn't succumb to its own elastic potential.

>>4191996
EATING IT

>>4191926
>>4191996
Oh wait, you are talking about drifting and not about the Dyson sphere collapsing in on itself. My bad.

If any one side of the Dyson sphere drifts closer to the star, then it would fee an increased pressure, not due to pressure of the star's radiation, but due to the pressure of the star's atmosphere. The closer one gets to the star, the denser the star's atmosphere becomes.

>>4192027
So call the Dyson sphere a mouth... or rather a mouth... or rather an intestine. Yeah, intestine.

>>4192027
So call the Dyson sphere a mouth... or rather a stomach.. or rather an intestine. Yeah, intestine.

>>4191966
As I said (>>4192051), the Dyson sphere would be stabilized by the star's atmospheric density gradient. The closer a surface gets to the star, the greater the pressure of the star's atmosphere.

I learned something new the other day. There are people searching for Dyson sphere's in our universe by examining the light, mass, heat and various other things on certain stars. A Dyson sphere, if found, would confirm life or past life.

>>4192104
It would do "a little" more than prove life exists beyond Earth. Those are sarcasm quotes.

>>4191744

fizx, I have been generous and have given you a week. I have had a glancing interest in your posts and have concluded that you are a high functioning retard that needs to stfu and immediately stop internetting, Unfortunately many of us here have already had to endure your presence but let us learn from it and destroy you before future generations have to suffer your stupid too.

>>4192160

>>4192162
>Retards gonna retard

>>4192104
Something like this?
http://home.fnal.gov/~carrigan/infrared_astronomy/Fermilab_search.htm

>>4192187
Tell you what, I dare you to make a better thread.

>>4192246
Have done and I never feel the need to tripfag about it. You are stupid and there is no benefit to you or anyone else for your identity to be known though it does help in knowing which posts to ignore.

>>4192270
>it does help in knowing which posts to ignore
I'm glad I could help. :D