Questions tagged [black-holes]

For questions about a region of space time where gravity is so strong that nothing, not even light, can escape it.

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2answers
97 views

Would an elecroweak star radiate similarly to a normal star? If so, would a habitable zone around it even be possible?

An electroweak star is a theoretical exotic star in which the radiation pressure from its core keeps it from collapsing into a black hole. Because of its theoretical nature, it's hard to find a lot of ...
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1answer
260 views

Finding out the mass of a black hole for it to last ten thousand years

In my story, one of the characters essentially possesses something akin to true invulnerability and is essentially immortal due to [redacted]. In this part of the story, a group of terrorists with ...
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1answer
177 views

How close can I bring a beam of light to a black hole before the information the beam contains is corrupted?

Given the following conditions: Two space stations of insignificant mass (compared to what can affect the transmission of a beam of light) are separated by a distance of 100,000 light years. With ...
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9answers
2k views

How to annihilate an object completely? [closed]

I would like to annihilate an object (approx size of a table), in that I want to make it not exist in any recognizable form. (gamma radiation, etc. would be fine). My knowledge of physics would fit on ...
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2answers
112 views

How many Ultra massive black holes should be added to a map of known black holes?

I was wondering how many Ultra-massive black holes can be added to the list of 8 known black holes with mass over 10 billion solar masses within 1 billion light years. Looking at our current maps, the ...
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1answer
84 views

Possible uses for time dilation in the ergosphere of a black hole?

A common use for time dilation in science fiction is for a ship moving at speeds close to the speeds of light and for those on the ship the journey takes less time than for those observing at another ...
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1answer
107 views

By what methods could the most energy and matter be collected from a supermassive black holes quasar jets?

I was wondering if it is possible to capture the majority of the energy and matter from the jets of a quasar from a supermassive black hole? The methods that I can think of is some sort of net like ...
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2answers
95 views

Is a particle beam the best method to fire a black hole at a target?

I want to weaponize black holes as projectile attacks in my story from small to supermassive and the two ways i can think of is using mass to attract mass or using matter to push it. Using a particle ...
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1answer
125 views

What size of black hole is the safest?

Stellar-mass black holes are obviously dangerous. Their massive gravitational field and tidal forces threaten any planet or star system that gets too close to them. Microscopic black holes are also ...
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1answer
315 views

What happens if I shot a blackhole pellet point blank at someone?

Imagine I had a sophisticated gun that is capable of producing a micro blackhole on contact with a target, that blackhole is designed to be completely evaporated as hawking radiation in exactly 1 ...
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3answers
178 views

Black holes: Can something that has fallen through the even horizon be recovered if the black hole evaporates quickly enough?

From puppetsock's reply to Is it possible to build a black hole (kugelblitz) gun?, it seems like a black hole of 228 tonnes evaporate after just 1 second. And the lifetime of a black hole in general ...
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2answers
163 views

How movable are miniature black holes?

I've purchased a miniature black hole on ebay. I've heard they make excellent kitchen disposal units. Unfortunately the seller says it is for collection only. Will I be able to move it? Anti-gravity ...
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1answer
178 views

What to do with planet nine if it is a Black Hole? [closed]

Recently it's been theorized that "planet nine" may be a black hole. If this was the case what could we do with it? What unresolved problems in physics could be solved by having such a thing ...
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1answer
175 views

What can happen in a non-deterministic world? [closed]

I was reading about a theoretical charged Black Hole known as the Reissner Nördstrom Black Hole, where should someone enter its Cauchy Horizon, will end up in a world not bound by determinism. What ...
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2answers
264 views

What's the Use of a Susskind Hologram?

(this question may need to go to sandbox for refining) Leonard Susskind proposed that the surface of a black hole might be kind-of recording device for everything falling into it. Where 3D of space + ...
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3answers
221 views

Can a galaxy be formed from a black hole?

I'm writing creative text and I'm curious to know, just as possibility, can a galaxy by any chance be formed out of a black hole?
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2answers
122 views

Could aliens from beyond the singularity of a rotating black hole survive and colonise regions of a normal universe?

Would it be possible for aliens that originated and evolved in a planetary system beyond the ring singularity of a rotating black hole to send individuals out into a normal universe to colonise it? Or ...
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1answer
100 views

Could life similar to life on earth exist and evolve in a large enough region of timespace?

Is it possible for a planetary system to form and support life similar to earth-life inside a region of 'timespace' (which is the space within a black-hole), assuming that there is enough space/time ...
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6answers
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Space-based black hole weapon effects

For the fluff of my story one of the space-ships is equipped with what I hope is one of the biggest F-you weapons in ship-to-ship combat: a miniature black hole launcher. The launcher fires a ...
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2answers
95 views

Could Kerr Metric Black Holes hypothetically be used for Interstellar Information Transfer?

Kerr Metrics should (extremely hypothetically) allow travel into "mirror" universes. However, I have heard that some theories estimate the time-swapped black hole on the other side of the ringularity ...
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5answers
643 views

How would one detect a black hole when there are no more light sources for it to refract?

The universe as we know it has ended. The concept of “natural” illumination ended when the last red dwarves and quasars died out. Now, only brown dwarves and blackholes dot the empty void that was ...
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7answers
694 views

Could I observe the black hole that created my area of space/universe?

My story has some very advanced robots that have spread throughout the galaxy. Their advanced technology has developed to massive radio and optical telescopes to view unexplored areas of space. When I ...
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2answers
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Astrophysical jets used as energy sources

How could astrophysical jets, emitting matter from black holes be used as energy sources by a space-faring nation? How could they be able to collect and use this form of energy?
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After surviving a black hole/wormhole, what are the chances of Earth start orbiting in a new solar system?

In the event of our sun suddenly becoming a black hole or wormhole of sorts. It transports the earth to another solar system similar to ours. Would it be possible for our planet to start circling ...
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3answers
152 views

How to tell it is a relativistic kugelblitz instead of other photonic attack?

Set in a quite distant future, intergalactic war is brewing and it is important to tell what form of attacks the enemy ship is using otherwise the battle will quickly become one sided. Anyway imagine ...
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How to tell a blackhole from a neutron star covered entirely by Dyson sphere painted in vantablack?

In a galaxy far far away... M6760 (I made it up) is an unusually massive neutron star billions of light years away and it is surrounded by a spherical Dyson sphere painted in new improved formula ...
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4answers
271 views

What kind of matter would be needed to maintain a black hole?

Let's say we have a reactor that taps into an artificial black hole (kugelblitz-type). What kind of matter would be needed to feed the black hole to sustain it? Would this matter be treated like fuel?
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What is more “plausible” as an FTL power source?

I’d like to avoid antimatter for a specific story purpose. In that case, which is a more “plausible” way to power an FTL drive: An artificial black hole An artificial neutron star (“neutronium”) ...
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1answer
101 views

Is it possible to create a wormhole by adding density?

A black hole is an object that has infinite mass, which is thought to tear a hole in space-time fabric. Would it be possible to not have a black hole, but have an object with near-infinite density, ...
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2answers
345 views

Is there a safe but weird distance from black hole merger?

I wish to create a world such that it can support the following plot point: the world experiences gravitational waves that are directly noticeable to the human population (i.e. they can feel or see ...
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3answers
99 views

How much energy is produced by a sphere of mirrors around a rotating black hole? How would it impact a civilisation in the Kardashev scale?

So, as a bit of background, my world takes the assumption that Planet Nine is a rotating primordial black hole, and humanity, a Type I civilisation, is able to build a sphere of mirrors around it (...
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Is a “Partial” Black-Hole Possible?

Black holes are created by the gravitational collapse of massive stars. But in theory, black holes can also be created by any mass at all that is confined within a small enough volume of space, ...
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How do you observe black holes up close? [closed]

So in the context of sci-fi movies and video games where characters get up close and personal to the black hole without getting too close and falling into the gravity well. Is this even possible? ...
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4answers
198 views

Using a black hole/antimatter as a weapon in a fantasy story

I'm writing a fantasy set in our world but an alternate timeline where a magical force has 'leaked' into our world from an alien one. The magic is based on science in that the magic is simply energy ...
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4answers
224 views

Black Hole as a Storage Device Version 2

This is based on: Black Hole as a Storage Device What goes into a black hole doesn't come out (except as random electrons or positrons). However, is it possible to store something within the event ...
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273 views

Is it possible to build a black hole (kugelblitz) gun?

Assume that space warfare is dominated by gamma and x-ray lasers (Wakefield-Plasma and Free Electron Lasers) capable of killing targets several light-seconds away. Stealth in space is possible due to ...
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16answers
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Black hole as a storage device?

I'm writing a sci-fi story, and there is a giant autonomous computer planet that constantly gathers resources from around the universe using drones. It stores a super weapon at the core of the planet, ...
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1answer
169 views

If someone dropped a black hole into the Sun, when and how will we notice it?

Suppose someone dropped a black hole into our lovely Sun a few million years ago. It was big enough (far bigger than that) from the start to eat matter faster than radiating it away, and kept growing ...
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1answer
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How do I feed my black hole?

Strange title I know, but you'll understand why quickly. I wanted to use a black hole to create absurd amounts of power for hopefully obvious reasons (kind of useful). The problem with natural large ...
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1answer
152 views

Could life exist on a planet that is heated mainly by hawking radiation from a super massive black hole that is millions of solar masses? [duplicate]

At a time long after the stelliferous there is a planet in orbit around a super massive black hole with almost all external heating coming from hawking radiation from the black hole it orbits. By ...
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1answer
114 views

Could a planetary nebula obscure the presence of a black hole/neutron star?

I have a civilization that lives on a planet located inside a nebula (and orbiting a normal, sun-like star). Would this nebula somehow interfere with/ obscure the sight of a rogue neutron star/ ...
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4answers
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A planet illuminated by a black hole?

Is it possible for a planet to be heated and illuminated by a black hole due to Hawking radiation at the same intensity as by a star? What mass and size should a black hole have to produce the same ...
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2answers
428 views

Escaping a blackhole with an Alcubierre drive?

If your ship just got trapped inside the event horizon of an super massive black hole, could the ship "accelerate" back out with an alcubierre drive?
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6answers
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How would someone destroy a black hole that’s at the centre of a planet? [duplicate]

For starters, the black hole is temporarily contained. But once it’s containment fails it will devour the planet. Obviously, that’s a bad thing. What’s a reasonable way to prevent that? Also the ...
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1answer
312 views

Schwarzschild Metric in a universe with the same space time metric as that described in the orthogonal series, but with massive gravitons?

The universe described in the orthogonal series http://www.gregegan.net/ORTHOGONAL/00/PM.html is one, in which the minus sign in the space time interval is replaced with a plus sign. So this universe ...
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2answers
344 views

Intragalactic velocity past the central black hole

In my story people are traveling from somewhere beyond the opposite side of the galaxy to Earth. The distance traveled is approximately 66 million light-years. I would like the travelers to ...
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1answer
255 views

Black hole stardrives/artificial gravity [closed]

I'm a sci-fi world builder, and I was recently reading Charles Stross's sci-fi/space opera novel Singularity Sky for inspiration, and I noticed some interesting but scientifically dubious ...
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0answers
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Could you disrupt the gravity of a black hole using quadrillions of supernova explosions? [duplicate]

For context, I’m planning a novel with as much ridiculous magic as ridiculous science so, yes I know, it’s impossible but that's the fun of mixing science and magic in worldbuilding. So the situation ...
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1answer
141 views

Is there a formula for scaling explosive detonation velocity? (Supernova level) [closed]

For context, I’m planning a novel with as much ridiculous magic as ridiculous science so, yes I know, it’s impossible but bear with me. There is a supermassive black hole that weighs 1 trillion solar ...
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3answers
2k views

Black holes as heat sinks

Cooling in space is a well known difficulty. There are many unpleasant consequences like no stealth in space, difficult space battles which turn into a short wars of attrition (because you have to ...