/sci/ - Science & Math

>>6439199
> Will there ever be a material strong enough to build a fully enclosed Dyson Sphere?
Well it certainly doesn't exist today, and so obviously nobody can answer that question, unless you're just looking for a "how likely is it?" answer

>If so, would it be a good idea to build one and use it as a ship
If you could build a dyson sphere, you probably don't have any real use to lug around some cheap rocks (planets). The dyson sphere could be significantly smaller than in your pic, with only the sun in it and people could just live on the shell.


But in all seriousness. Our vision of an extremely advanced technology like a dyson sphere is more likely to be laughable in the far future due to how ignorant we are of as yet unknown scientific principles. Not necessarily because they _couldn't_ make one.. Maybe they could, but nobody does it because there are far more efficient ways to get energy.

>A team of astronomers lead by Rubab Khan stumbled over something strange in the Triangulum galaxy (M33) about three million light years away. They were shocked to discover that while it was quite dim in the visible light and near-infrared spectrum, in the mid-infrared spectrum the blasted thing is the most luminous object in the entire freaking Triangulum galaxy.
>A gentleman who goes by the handle TME points out that an object that is very dim in the visible spectrum but unusually bright in the IR spectrum is the signature of a Dyson sphere.

Is this true? I read it on /x/ and tried googling but nothing is turning up

It's an overkill of an engineering project. The same technological advances and sheer quantities of material for such a task could be better spent on creating a significantly artificially smaller but denser (man-made sustained fusion) star. And instead of using solar collectors, utilizing the magnetic fields produced from the man-made star to generate currents in surrounding coils.

Now the reason why a civilization may actually create a Dyson sphere is to display technological superiority; that they simply "can" do it.

uneducated fag here. I need to know what number
6e+8 centimetres actually is. I was trying to find out how many solar systems you would need to build a dyson sphere with a 1 au radius and 6000 km thick and thats what the calculator game me. Are we talking trillions or billions here?

Obviously there isn't a for sure answer but say we take a human civilization starting from 10 000 years ago and put them in a dyson sphere with a radius of 1 AU. The entire surface of the inside is habitable with earth-like conditions. Gravity, atmosphere composition, ect. Now fast forward until the reach our level of technology, would they have figured out that they were in fact inside something artificial or would it take significantly longer?

If there was a dyson sphere with a radius of 1AU within 50 lights years of our solar system (and assuming its containing all the light from the star within it) would we defiantly have noticed it by now?

Yup, if earth existed for so long. Inhabitants on earth would, in the end, not see any stars.

What would be the easiest, quickest, and cheapest way to capture all the energy of a star?

If I created a dyson sphere around the sun and had it contain 100% of the light could anybody here brainstorm a way another civilization might detect it from the outside light-years away?
Second, If i created it so it was between the orbit of Jupiter and Neptune would the gravity of the sun "pierce" the dyson sphere keeping Neptune in the orbit it always had.
Third, what would it look like inside said dyson sphere.

I realize no one can say for sure i just want some educated guesses.

How does it feel when there are a few candidates for these in the galaxy cited by the goverment.

(http://home.fnal.gov/~carrigan/infrared_astronomy/Fermilab_search.htm))

>>3958382
Micrometeroites have the ability to start puncturing holes in it. The ribbon is made very wide, and curved, so that anything large enough TO actually snap it clean off could be detected and vaporized. Any holes that appear in the cable are supposed to be patched up by spider elevator cars which weave new CNTs into the cable to prevent disintegration. It's own version of maintenance.

Hey /sci/borgs, im planning to major in Neuroscience/computer science and am wondering if there is any sense of me taking linguistics in my undergrad. I took an intro course but so far its been rather 'meh'.

If I do drop it, should I take a supplementary course like philosophy? Or cut out peripheral courses alltogether?

The future will not be a utopia. Discuss.

Not that it will be bad, but it won't be a utopia.

What does one do with a Political Science major? ROTC and make a career out of the Armed Forces?

What else?

ITT: it's 10,000 years from now. Describe the universe you inhabit.

Hard Mode: No ftl, or hand wavium, no magic physics etc.....

>>2206232
implying that one cannot find beauty in things while seeking to understand or even improve them

the problem with a full sphere is that gravity cancels itself out, so it will not be kept in relative position to its host star by gravity.

The other problem is that centrifugal force only keeps the equatorial section in "orbit". The polar regions would experience the full force of the host star's gravity and would have to maintain their position purely through tensile strength of the material of the sphere.

A set of rings would be much easier to construct than a full sphere

Sign me up.

What is /sci/'s stance on Extra terrestrials. Do you think Extra Terrestrials will be benevolent, malevolent, neutral, indifferent, non existant, or something else? Do you SETI is good or bad? What should our attitude be, assume they are bad? Start damping our signals?

TL:DR Extra Terrestrials What do you think?