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http://arxiv.org/abs/1103.2791
They say white dwarfs are the same number as Sun-like stars.
Most if not all have a second generation of rocky planets ( made from the accretion disk formed by the ejecta fallback of the puffing red giant phase star ).
The natural habitability boundaries in space and time are narrowish, but in fact via using OPTICAL technologies - ALL the secondary planetary progeny might be made habitable.
The tidal locking is not a problem using 24-hrs orbiting soletas.
To be so deep in a gravity well gives the civilizations there pretty huge dynamical advantages.
The shear little size of the system ( comparable with the Earth's Hill radius and 100s of times smaller in linear dimensions then "real" solar system ), gives millions of times better astroengineering dimensionality / economy of materials and time: in corresponding degree easier development of "soft" Dyson spheres, Birch supra-stellar shell worlds, smaller optics to block, concentrate, diffuse .. manipulate light and EM fields.
A white dwarf is better mining site, too - being a corpse of a former stellar core it is super-enriched with heavier elements / astronomical "metals". A civ established @ it could exchange / extract usefull stuff for trash.
So compact and dense object is excellent mechancal engine too - for moving planets, space ships and colonies, accelerating momentum exchange pellets, for dynamical / kinethic structures ... It is piece-o-cake around a WD to be installed a Cemplerer rosette of all available cold and hot / old and new planets which to be kept dynamically metastable by using the central post-star as a kinethic-momentum "sink" with such power and stability that exceeds the "normal" "stable" systems. The planets could be linked by solid state bridges of combination of space-towers and rotating habitats...
Even the rare or perhaps impossible variety of planetless WD represents a prime location cosmic realty ...: via magnetic, laser, atomic laser...etc. manipulation -- powered by its own content of energy and mass -- the WD can be made to spit precisely the needed construction materials for any type of gravitar and rotar habitats imaginable.
Last edited by karov (2013-03-01 05:16:29)
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https://www.google.bg/search?q=magnetic … s&ie=UTF-8
magnetically sustained stronger chemical bonding?
= 10s and 100s of K high-temperature life / replicators / tech??
Then the WD's atmosphere could be "infected" with evolving and recombining replicators which to tame it turning it from radial omni-directional source of photonic and corpuscular radiation and forces into giant laser.
On 1m miles distance ( orbital radius ) an object with diameter of 10k miles ( a planet ) occupies 0.000006217th part of the sky area.
If the luminosity of the WD completely sealed-in via use of such hypermagnetic biochemical tech-ecology ( WD won't puff cause it is too dense and tightly packed by gravity ) and the only light let out via tiny "window" as an optimal in power, frequency, polarity, colors ... for the planet(s) BEAM OF LIGHT - then the habitability term increases from several billion years to HUNDREDS of TRILLIONS of years ... ...
The planetary material dissipation could be kept really low ( dozens of thousands of times lower than natural ) using local energy and fields source and resources ( the WD itself ), and also there is a stockpile of hundreds of thousands of times the planetary mass into readily available material en situ for replenishment of the lost by normal cosmic weathering chemicals...
bbbbrrrrr ... TRILLIONS of centuries ( dinosaurs lived million centuries ago, trillion is = million million centuries ... )... a normal planet ... welllll, except replenishment it'll need stirring and reactivation of its interior , but EVERYTHING needs maintenance anyway.
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Interesting stuff.
As far as stiring such planets, perhaps Jupiters system could be a model.
The spin of Jupiter I believe tries to raise the orbits of Io, Europa, and Ganymede with tidal action, but because those moon cause a flexing of the interiors of each other, the orbits do not rise, but instead the spin is turned into heat which at least in the case of Io drives volcanism.
Some of the other parts of your telling suggest that that if there were to be successors to the present day human population of Earth, they would first migrate into the outer solar system and adapt to icy worlds, and then when the sun became a white dwarf, they would migrate back in. Perhaps they could even influence the formation of new planets close to the white dwarf.
That's along time from now. I am guessing it won't be humans as we define ourselfs.
As for migrating to white dwarf systems, well maybe someone will. However your second part implies that the chemestry of our bodies would not behave in a manner we are evolved/created for. At least not close to the WD.
I cannot speculate on how that could be managed.
Done.
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http://robert-ibatullin.narod.ru/orbis- … liard.html
just copy/paste the link via translate.google.com - it is in Russian language. Very deep understanding the author has.
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