question about black holes

[Baleia espacial]

In the OA universe, can a wormhole that collapsed into a black hole be turned back into a wormhole?

[Drashner1]

In the OA universe, can a wormhole that collapsed into a black hole be turned back into a wormhole?

In principle, yes. In practice, meaning within the known technological capabilities of the Terragen archailects - no. From the reference paper titled Wormhole Engineering in Orion's Arm: An Overview - written by Adam Getchell a physicist and the 'inventor' of OA's wormholes:

A wormhole can be constructed from a Schwarzschild black hole, if sufficient quantities
of phantom radiation exist. This process involves symmetric, precisely timed imploding pulses of
pure radiation with negative energy density, and is essentially the reverse process of wormhole
collapse to a black hole. Since the resulting wormhole throat is smaller than the Schwarzschild
radius, the collapse process involves at least 70% of the mass of the wormhole radiating away,
and the pulses must be nearly infinitely thin and precisely timed, this method of wormhole
construction is not believed to be feasible without enormous quantities of inflaton or axion fields
and exceptional computational ability. Nevertheless, this technique is widely studied for the
insights it gives to the stability problem.
Requests for interviews with transapient wormhole architects went unanswered, and
various Hider clans reputedly capable of spacetime engineering remain unavailable. Some
researchers have also noted extremely large energy signatures in intergalactic regions where
phantom energy densities would be expected to be large.

Note that - even if this were possible for Terragens, the resulting wormhole would probably not be a 'repaired connection' between the two points that the original WH connected, but just be a new wormhole/pair of WH mouths that would then have to be transported in the normal way to connect to two points. That kind of 'projecting a wormhole to where you want to go' effect doesn't appear to be possible for wormholes in the RL per existing theories and therefore isn't possible in OA.

Hope this helps,

Todd

[Puki]

In the OA universe, can a wormhole that collapsed into a black hole be turned back into a wormhole?

In principle, yes. In practice, meaning within the known technological capabilities of the Terragen archailects - no.  From the reference paper titled Wormhole Engineering in Orion's Arm: An Overview - written by Adam Getchell a physicist and the 'inventor' of OA's wormholes:

A wormhole can be constructed from a Schwarzschild black hole, if sufficient quantities
of phantom radiation exist. This process involves symmetric, precisely timed imploding pulses of
pure radiation with negative energy density, and is essentially the reverse process of wormhole
collapse to a black hole. Since the resulting wormhole throat is smaller than the Schwarzschild
radius, the collapse process involves at least 70% of the mass of the wormhole radiating away,
and the pulses must be nearly infinitely thin and precisely timed, this method of wormhole
construction is not believed to be feasible without enormous quantities of inflaton or axion fields
and exceptional computational ability. Nevertheless, this technique is widely studied for the
insights it gives to the stability problem.
Requests for interviews with transapient wormhole architects went unanswered, and
various Hider clans reputedly capable of spacetime engineering remain unavailable. Some
researchers have also noted extremely large energy signatures in intergalactic regions where
phantom energy densities would be expected to be large.

Note that - even if this were possible for Terragens, the resulting wormhole would probably not be a 'repaired connection' between the two points that the original WH connected, but just be a new wormhole/pair of WH mouths that would then have to be transported in the normal way to connect to two points. That kind of 'projecting a wormhole to where you want to go' effect doesn't appear to be possible for wormholes in the RL per existing theories and therefore isn't possible in OA.

Hope this helps,

Todd

In OA, can the Hider Clans do spacetime engineering? Where would they get the technologies and minds required to do things like that?

-Puki 

[Drashner1]

In OA, can the Hider Clans do spacetime engineering? Where would they get the technologies and minds required to do things like that?

-Puki 

No - Only beings of S3 or above can do space-time engineering and there are no indications that any Hiders are at that level.

Hope this helps,

Todd

[weirdspecter]

I would suspect that the phrase:

and various Hider clans reputedly capable of spacetime engineering remain unavailable.

is either a holdover of a previous era in the setting (during which either Hiders were more toposophically diverse, or during which it was an open question whether modos/low transaps could do metric engineering), or is meant to suggest that some fringe researchers considered asking various groups who might normally claim to be able to do spacetime engineering, even though common wisdom holds that no-one beneath S3 can achieve it.

All the best,

Lilly

[stevebowers]

One important reason that Hiders can't do spacetime engineering is that it requires lots of energy to bend spacetime, and their technology would be detectable from great distances, either as ripples in the the metric or as waste heat.

But that doesn't necessarily rule out acquired metric technology- certain Hiders might be given technology by high toposophic benefactors, or find it hidden in deep space by long-vanished entities of various kinds. Metric technology created by an S:5 or S:6 might be powerful yet subtle, and practically undetectable except by entities of a similar level.