Is it possible that a planet, or an entire solar system, can exist in a functional state within the event horizon of a black hole?
To save yourself grief, check your question yourself before posting.
Find event horizon on wikipedia
Find event horizon on wikipedia
simple answer: No.
No, the gravitational pull would obliterate whichever body entering the black hole.
As the radial coordinate becomes time-like, you cannot return to the same radius or even stay at constant radius. Further, even as you increase your speed there is a finite maximum proper time in which you hit the singularity.
So neither the ballistic, nor the powered-flight scenarios inside a black hole are going be comfortable for terrestrial life (life as we know it). In addition to that, tidal forces are proportional to the diameter of the object and even for a million-mass black hole, would tear a Earthly planet apart. A 3 billion mass black hole might not tear Earth apart at the event horizon, but the tides would swamp the cities of the world (and the weather would probably best be described as hellish) and after passing the singularity the tides would indeed increase to tear the planet apart.
So neither the ballistic, nor the powered-flight scenarios inside a black hole are going be comfortable for terrestrial life (life as we know it). In addition to that, tidal forces are proportional to the diameter of the object and even for a million-mass black hole, would tear a Earthly planet apart. A 3 billion mass black hole might not tear Earth apart at the event horizon, but the tides would swamp the cities of the world (and the weather would probably best be described as hellish) and after passing the singularity the tides would indeed increase to tear the planet apart.
I don't expound, but my post is similar to what rpenner explained in his post
No, becouse black holes don't exist.
Sorry DavidD, they do exist. 
QUOTE (midwestern+Jul 9 2008, 11:52 AM)
Sorry DavidD, they do exist.
No they don't, it's just a really small sphere stuck on the telescope lens.
No they don't, it's just a really small sphere stuck on the telescope lens.
QUOTE (excaza+Jul 9 2008, 05:13 PM)
No they don't, it's just a really small sphere stuck on the telescope lens.
No black hole is radiation of galaxy.
No black hole is radiation of galaxy.
Good one excaza. 
WELL BLACK HOLES DO EXIST AND THERE HAVE BEEN MANY OBSERVATIONS OF IT IN RECENT PAST.
THERE ARE POSSIBILITIES OF WORMHOLES IN ROTATING BLACK HOLES BUT THE PROBABILITY FOR THE PRENSENCE OF A SS WOULD BE A 1 IN A BILLION OR MAYBE MUCH LESSS...EVEN THE PRENSENCE OF A WORMHOLE DUE TO DUAL EVENT HORIZONS IN A KERR BLACK H, WOULD THEORETICALLY THROW THE SOLAR SYSTEM WHIRLING INTO SOME OTHER PART OF THE UNIVERSE,BUT IT WOULDNT LET IT STAY UNDER ITSELF FOR LESS THAN A SMALL AMOUNT OF TIME.
ALTHOUGH IF THE CONDITIONS OF THE PRESENCE OF A WORMHOLE ARE NOT MET WITH , THE SOLAR AYSTEM WOULD MERGE WITH THE BLACK HOLE AND THE EXTRA MASS CREATED IN THE PROCESS WOULD MAY GET RADIATED AS GRB'S(GAMMA RAY BURSTS).
THERE ARE POSSIBILITIES OF WORMHOLES IN ROTATING BLACK HOLES BUT THE PROBABILITY FOR THE PRENSENCE OF A SS WOULD BE A 1 IN A BILLION OR MAYBE MUCH LESSS...EVEN THE PRENSENCE OF A WORMHOLE DUE TO DUAL EVENT HORIZONS IN A KERR BLACK H, WOULD THEORETICALLY THROW THE SOLAR SYSTEM WHIRLING INTO SOME OTHER PART OF THE UNIVERSE,BUT IT WOULDNT LET IT STAY UNDER ITSELF FOR LESS THAN A SMALL AMOUNT OF TIME.
ALTHOUGH IF THE CONDITIONS OF THE PRESENCE OF A WORMHOLE ARE NOT MET WITH , THE SOLAR AYSTEM WOULD MERGE WITH THE BLACK HOLE AND THE EXTRA MASS CREATED IN THE PROCESS WOULD MAY GET RADIATED AS GRB'S(GAMMA RAY BURSTS).
What's with the shouting? 
Anyone might start thinking the banned idiot Nick had snuck back in again
Anyone might start thinking the banned idiot Nick had snuck back in again
While not disputing the many fine black hole candidate observations of objects which currently tested hypotheses have no other viable candidate than a GR black hole, could you please clarify your criteria for what constitutes a solar system within a black hole and how you came to your estimate of its probability.
I strongly disagree with your claim that the bulk of a planet's mass would be radiated in the process of capture by a black hole and challenge you to cite peer-reviewed claims supported by calculation.
I strongly disagree with your claim that the bulk of a planet's mass would be radiated in the process of capture by a black hole and challenge you to cite peer-reviewed claims supported by calculation.
WELL I WAS TALKING OFF IN GENERAL ABOUT THE PROBABILITY ,IF YOU ARE AWARE OF SUCH A METHOD YOU MAY EXPLAIN IT TO ME.
ANYWAYS.
I DIDNT MEAN THAT THE SOLAR SYSTEM WAS THERE TO STAY, I MEANT THE POSSIBILITY OF THE SOLAR SYSTEM TO GET INTO A WORMHOLE OF THAT MAGNITUDE , AND THE INSTANCE AT WHICH THE SOLAR SYSTEM STAYS BETWEEN THE TWO EVENT HORIZONS. BY RADIATION I MEANT THE RADIATION GIVEN OFF BY THE RELATIVISTIC MASS PRODUCED DURING THE FALL OF SOLAR SYSTEM INTO THE BLACK HOLE ALTHOUGH IT WOULD BE LESS INTENSE TO BE OBSERVED .
WELL IN ANY CASE GRAVITATIONAL WAVES ARE GIVEN OF BY BLACK HOLES TO GAIN STABILITY AFTER MERGING WITH OTHER MATTER.THAT IS ALSO A FORM OF RADIATION WHICH IS NOT YET DETECTED .BUT IS THEORETICALLY QUITE IMPORTANT.
ANYWAYS.
I DIDNT MEAN THAT THE SOLAR SYSTEM WAS THERE TO STAY, I MEANT THE POSSIBILITY OF THE SOLAR SYSTEM TO GET INTO A WORMHOLE OF THAT MAGNITUDE , AND THE INSTANCE AT WHICH THE SOLAR SYSTEM STAYS BETWEEN THE TWO EVENT HORIZONS. BY RADIATION I MEANT THE RADIATION GIVEN OFF BY THE RELATIVISTIC MASS PRODUCED DURING THE FALL OF SOLAR SYSTEM INTO THE BLACK HOLE ALTHOUGH IT WOULD BE LESS INTENSE TO BE OBSERVED .
WELL IN ANY CASE GRAVITATIONAL WAVES ARE GIVEN OF BY BLACK HOLES TO GAIN STABILITY AFTER MERGING WITH OTHER MATTER.THAT IS ALSO A FORM OF RADIATION WHICH IS NOT YET DETECTED .BUT IS THEORETICALLY QUITE IMPORTANT.
Well then, the probability is simply the per-volume frequency of collisions of 1) a solar system with 2) a black hole large enough to not tidally disrupt a solar system times the observation volume times the event time.
Since the object labelled 2 has never been observed, and certainly doesn't exist in this galaxy, the simplest answer is zero. You would need at least a 100-billion solar mass black hole to eat even a tiny solar system without tidally disrupting it.
A more complicated estimate would require some model for black hole mass distribution and/or relation to galaxy distribution and more detailed estimates of the other factors.
The world-record for measured black hole mass is currently the 18 billion solar mass primary in the binary object OJ 287 http://www.nature.com/nature/journal/v452/...ature06896.html
Since the object labelled 2 has never been observed, and certainly doesn't exist in this galaxy, the simplest answer is zero. You would need at least a 100-billion solar mass black hole to eat even a tiny solar system without tidally disrupting it.
A more complicated estimate would require some model for black hole mass distribution and/or relation to galaxy distribution and more detailed estimates of the other factors.
The world-record for measured black hole mass is currently the 18 billion solar mass primary in the binary object OJ 287 http://www.nature.com/nature/journal/v452/...ature06896.html
Caps lock.
Shut it off.
Shut it off.
Well , thanks I was curious to know .
now certainly it is possible for such a black hole to exist at least hypothetically in a collapse of galaxy clusters.
although it has been certainly a possibility of low probability in our universe for such black holes to have observational concequences .
so certainly the solar system must not survive in almost all cases.
now certainly it is possible for such a black hole to exist at least hypothetically in a collapse of galaxy clusters.
although it has been certainly a possibility of low probability in our universe for such black holes to have observational concequences .
so certainly the solar system must not survive in almost all cases.
We all live within the event horizon of a black hole as our universe is a black hole.
So the answer is yes sort of.
A planet would not survive the trip without being ripped apart.
If the energy within the black hole cooled enough after the initial collapse (Big Bang theory) many planets and indeed solar systems would exist.
Have a nice day.
Ed Wood
So the answer is yes sort of.
A planet would not survive the trip without being ripped apart.
If the energy within the black hole cooled enough after the initial collapse (Big Bang theory) many planets and indeed solar systems would exist.
Have a nice day.
Ed Wood
No
DavidD is a classic example of a brown hole system.
QUOTE (Dr Fred A Wolf+Aug 1 2008, 11:32 AM)
DavidD is a classic example of a brown hole system.
I think such system is in each cranck/trole/wolf brain
I think such system is in each cranck/trole/wolf brain
QUOTE (DavidD+Aug 1 2008, 11:35 AM)
I think such system is in each cranck/trole/wolf brain
2 members use "cranck", one of them is you D'D ..... the other, SirShanson - most curious?
2 members use "cranck", one of them is you D'D ..... the other, SirShanson - most curious?
QUOTE (Ed Wood+Jul 16 2008, 11:52 PM)
We all live within the event horizon of a black hole as our universe is a black hole.
So the answer is yes sort of.
A planet would not survive the trip without being ripped apart.
If the energy within the black hole cooled enough after the initial collapse (Big Bang theory) many planets and indeed solar systems would exist.
Have a nice day.
Ed Wood
Oh really, prove it.
We can only guess; perhaps what we experience might manifest from a co-existing duality operating both inside and outside of an event horizon; the inner condensing component actually creates the outer inflationary one, courtesy of negative time (recursion); this concept could be applied to all particles, even photons; in which this self-sustaining duality is electromagnetism - the magnetic component existing above the EH, the electric beneath - one creates the other in a mutually dependant event loop; swapping identities @ the EH in a 720 degree cycle.
You are guilty of stating BS as fact, please follow my example and state BS, as BS!
otherwise the FM and a few prominent others will slash yerbutt to burger-meat.
So the answer is yes sort of.
A planet would not survive the trip without being ripped apart.
If the energy within the black hole cooled enough after the initial collapse (Big Bang theory) many planets and indeed solar systems would exist.
Have a nice day.
Ed Wood
Oh really, prove it.
We can only guess; perhaps what we experience might manifest from a co-existing duality operating both inside and outside of an event horizon; the inner condensing component actually creates the outer inflationary one, courtesy of negative time (recursion); this concept could be applied to all particles, even photons; in which this self-sustaining duality is electromagnetism - the magnetic component existing above the EH, the electric beneath - one creates the other in a mutually dependant event loop; swapping identities @ the EH in a 720 degree cycle.
You are guilty of stating BS as fact, please follow my example and state BS, as BS!
otherwise the FM and a few prominent others will slash yerbutt to burger-meat.
For a moment at least.
PhysOrg scientific forums are totally dedicated to science, physics, and technology. Besides topical forums such as nanotechnology, quantum physics, silicon and III-V technology, applied physics, materials, space and others, you can also join our news and publications discussions. We also provide an off-topic forum category. If you need specific help on a scientific problem or have a question related to physics or technology, visit the PhysOrg Forums. Here you’ll find experts from various fields online every day.
To quit out of "lo-fi" mode and return to the regular forums, please click here.