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bloo
B.V. VIP - Contributor
Joined: Apr 06, 2003
Posts: 6964
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 Posted: Wed May 07, 2008 3:50 am Post subject: What's on the other side of a black hole? |
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Question: What is on the other side of a black hole?
Answer: There is no other side.
Science fiction has populated the idea that a black hole serves a portal to another world. If you could pass through, where does a black hole go? Perhaps you'll come to some other dimension, or re-emerge from some other part of the Universe?
No, a black hole only leads to death, for you, your spaceship, and another else that's unlucky enough to fall in.
Imagine you fell into a star like our Sun, there would be no question what would happen to you. The intense heat, gravity and pressure would kill you. If you compress more than 5x the mass of the Sun into a tight little area, you get a black hole. But the gravity, heat and pressure are all still there, just much more intense.
If you actually fell into a black hole, the tidal forces pulling at you are so extreme that the force on your feet is dramatically stronger than the force at your head. You would be stretched out and torn into pieces, and then those pieces would be torn into pieces. You would eventually be pulled into a stream of atoms, winding their way down to the surface of the black hole. For this process, scientists have a technical term: spaghettification.
Let's say you could survive this journey. Where does the black hole lead? No where. All of the mass of the star that came before the black hole is still there, pulling at you with all its gravity. This intense gravity would tear every molecule apart, and all the atoms. Protons and electrons would be crushed together to create neutrons, and then these would be crushed together even further into some kind of exotic form of superdense matter.
It's even possible that the heart of a black hole is single point of infinitely small size, containing the mass of many stars. This black hole is not a portal to anywhere, it's just a final destination.
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willo
B.V. Lurker
Joined: Dec 29, 2002
Posts: 203
Location: Inez, KY
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| Posted: Sat Jun 28, 2008 8:21 am Post subject: |
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That's a nice article - good post. It's a common misconception that black holes are as I believe most people consider them to be, like a tunnel. In fact, they're just a really dense relatively small object sitting there in space time creating a deep pocket in said space time. Like the old analogy - hold a sheet out and drop a bowling ball in the middle of it. more than likely the bowling ball will hit the floor taking part of the sheet with it. Same deal. You in effect have a hole, but there is no "other side" if you throw an M&M in the "hole" it doesn't hit another side, it hits the bowling ball, which is the very very very dense core/point/whathaveyou
Pretty crappy explanation I know, and I pretty much just completely repeated the article in a poor manner, however I wanted to say something as I've tried to explain this to people many times.
Thanks again for the post. |
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TNuke
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Joined: May 27, 2003
Posts: 636
Location: Texas
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| Posted: Mon Jul 21, 2008 10:47 am Post subject: |
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Sounds like you got it right bloo. But, and this is a big but, the physics at play inside the black hole are still very much an unknown. Yes, you would be killed long before you got anywhere near the object at the center of the black hole but, as you proposed, if you could survive the trip what would you see? I do not think that black holes lead to another "dimension" (an overused Sci-Fi term) but there certainly can be a place that is "outside" the universe.
There is actually evidence of this in the form of GRBs. No, not another member of the Bush family, but Gamma Ray Bursters. These objects (events) are truly bizarre. They occur at the edge of the universe and implies (at least to me) that the universe is expanding into something. That implies that there is a place outside the known universe. GRBs are enormous explosions, so large that they defy any explanation, and not only that, the nature of the explosions themselves is also bizarre. Normal explosions have one or two peaks followed by a sharp drop off, but GRBs look like they are "continuous" explosions. NOTHING does that! I have a theory as to why but that is a long conversation.
Bottom line is that it could be that there is a process going on at the center of black holes that may be leaking energy/matter out of the universe. Black Holes do dissipate over time and eventually disappear altogether. So what falls into the black hole, falls out of the universe. The question is, what physics would apply to you if you fell out of the universe? Would you become a Human GRB? |
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