[akvadrako]

> It is theoretically possible that the black hole is still performing fusion, and emitting light and heat, like a regular star.

I don't think that's a useful picture. It's closer to the truth to say that from the outside perspective, all the information and energy sits on the border and there is not even an inside to speak about. In other words, it's the edge of the universe and what's past the event horizon is another universe. Not like a star at all.

[blackrock]

To me, the concept that there is another universe, beyond the Event Horizon, is a little silly.

However, for fun, I once thought of a science fiction scenario for a novel.

I thought a Black Hole, can be used as the instrument for a wormhole in space. An Einstein-Rosen Bridge, that connects our universe to another universe, in the multiverse.

But there are a lot of plot holes in this idea. If light cannot escape the black hole, then you somehow need to go faster than light, to traverse the wormhole, and to escape it, when you cross over to the other side. So, once you exit the black hole, then you land at the other side, and there is a whole other universe there, with its own set of stars.

But, this will also allow other people from another universe, to cross into our universe, via this black hole.

Then how does such a black hole form?

It starts with a very massive star, more massive than a Neutron Star, that roams around our universe. Then, in an adjacent universe, another very massive star is wandering around also. Think of our universe as a bubble, and the adjacent universe is another bubble. These two massive stars, will distort the fabric of their bubbles, at the edges. The two stars will gravitationally attract each other, and they will basically punch a hole through each bubble. And when they collide, the mass from each star will form the structure of the wormhole. They won't explode on contact, but instead, it will now form a bridge between two universes.

For millions of years, they will dance around each other, until they finally find a stable orbit, where both are spinning around each other.

Think of this as a binary star system, where the two stars are rotating around each other, so fast, that it forms this virtual wall. This virtual wall, is the structure of the Einstein-Rosen bridge. And in the middle, it is gravitationally neutral.

And this wormhole structure, will now allow regular spacecraft, that can travel faster than light, to traverse the wormhole, and emerge on the other side.

Next, I just have to add the other parts of the story, like the bad guy, the love story and love triangle, and some good guy that is searching for himself. And with that, I'll have a blockbuster novel that I can turn into a live action movie.

[wruza]

Ah, that story when realistic physics happened and she loves him. First question, lasers or blasters? Second, is good guy’s dad bad guy?

Third, probably least interesting, how does one get into BH travelling FTL, if that makes you go back in time?

[pnut]

Lee Smolin proposed a really compelling concept in "Life of the Cosmos" - that the reason our universe has the universal constants that it does, is the product of natural selection at the cosmological level.

https://en.wikipedia.org/wiki/Lee_Smolin#Fecund_universes

His idea is that production of black holes is the universe producing offspring, and our perception that a black hole is constrained within a coordinate space in our own universe, is an illusion.

[trophycase]

I personally subscribe to this theory. I also think it's plausible that the development of intelligent life may be a part of the universe's reproductive process and may end up facilitating it in some way

[marcosdumay]

> From the outside perspective, all the information and energy sits on the border

Are you sure that's known? What kind of experiment would settle that?

[qubex]

Since at the event horizon (schardzchild radius) time dilation becomes infinite, essentially time ceases there. That's why it's called an “event horizon”: because events (four-dimensional coordinates) become disconnected there. As time is frozen (from an external observer's perspective) stuff ceases to move and just “piles up” there. From the in-falling matter's perspective, however, the transition occurs in finite proper time. Once it has crossed the horizon, it finds itself inside the hole where the direction of space pointing towards the horizon (inwards) becomes ‘timelike’ (in the sense that its flow cannot be arrested and it is unidirectional) and time becomes ‘spacelike’ (in the sense that it could be negotiated at will).

No experiment that I know of could confirm this because everything will depend on extrapolation from less extreme and finite scenarios.

[pault]

You could go into the black hole yourself but you'd need to communicate the results of your experiment by twitching the second hand on your daughter's watch who, conveniently, works for NASA.

[qubex]

Interstellar infuriated me worse than the average “space opera” Star Wars/Star Trek-type crap because it spread the pretence of being scientifically accurate and plausible.

Before we get to the black holes part... why didn't they have timestamped signals from the surface of that water-planet? Why didn't they go into a polar orbit (as opposed to equatorial orbit) around it so as to minimise the cumulative time dilation around the black hole it was orbiting? What kind of specific impulse were they supposed to have to be able to take off from it after they'd landed.

Oh, I cringed. I cringed so hard. Poor Kip Thorne.

[Santosh83]

In the first place it is just ridiculous to envision settling humanity on to a planet so close to a supermassive black hole & experiencing such extreme time dilation. It was foolish to have sent an astronaut there at all, let alone the later party going to check on her. But then, Kip Thorne confessed that Miller's Planet was essentially something the studios demanded and he wasn't given an option to exclude it. He wasn't even given an option to make the time dilation less extreme.