This black hole has probably already "eaten" most or all of the stars that formed nearby, and stars further out are mostly safe from being pulled in.
Since this black hole already weighs a few million times the mass of the Sun, there will only be small increases in its mass if it swallows a few more Sun-like stars.
There is no danger of the Earth located 26, light years away from the Milky Way's black hole being pulled in. Future galaxy collisions will cause black holes to grow in size, for example by merging of two black holes. But collisions won't happen indefinitely because the universe is big and because it's expanding, and so it's very unlikely that any sort of black hole runaway effect will occur. The late physicist Stephen Hawking proposed that while black holes get bigger by eating material, they also slowly shrink because they are losing tiny amounts of energy called "Hawking radiation.
Hawking radiation occurs because empty space, or the vacuum, is not really empty. It is actually a sea of particles continually popping into and out of existence. Hawking showed that if a pair of such particles is created near a black hole, there is a chance that one of them will be pulled into the black hole before it is destroyed. In this event, its partner will escape into space.
The energy for this comes from the black hole, so the black hole slowly loses energy, and mass, by this process. Eventually, in theory, black holes will evaporate through Hawking radiation.
But it would take much longer than the entire age of the universe for most black holes we know about to significantly evaporate. Black holes, even the ones around a few times the mass of the Sun, will be around for a really, really long time!
Want to visit a black hole? Galaxy NGC is shown in visible light and X-rays in this composite image. The X-ray light is coming from an active supermassive black hole, also known as a quasar, in the center of the galaxy. This supermassive black hole has been extensively studied due to its relatively close proximity to our galaxy. Scientists obtained the first image of a black hole, seen here, using Event Horizon Telescope observations of the center of the galaxy M The image shows a bright ring formed as light bends due to the intense gravity around a black hole that is 6.
Image credit: Event Horizon Telescope Collaboration. This animation illustrates the activity surrounding a black hole. In order for this dramatic separation to happen, the particles produced in the quantum fluctuation must have very long wavelengths.
Strange as it may sound, quantum mechanics says that all particles, as we usually refer to them, are also waves, and thus they have wavelengths that describe the distance between their successive peaks. Particles that are produced by quantum fluctuations and that have "wavelengths that are comparable to the size of the black hole are able to tunnel out," Hamilton said.
Their huge wavelengths make them free to roam in domains that extend beyond the boundary of the black hole. In the case of the black hole that is at the center of our Milky Way galaxy , particles tunneling out from it have wavelengths approximately 14 times the radius of our sun.
For supermassive black holes, particles must have wavelengths billions of suns long in order to tunnel out. As you may have guessed, there aren't a whole lot of particles that fit the criteria required to escape black holes. That revealed a lot. The matter that produces the jets appears to come from an orbital position near the innermost edge of the accretion disk, about 5.
That supports years of conjecture that black holes are anything but motionless. Although the study centers on a single jet, the ramifications extend across the galaxy, since the energy blasts broadly distribute matter and energy, feeding and disrupting star formation.
In the context of a question that has a stone with an infinite source of fuel and finite mass! A precise answer to this infinite fuel vehicle cannot be had anyway. Show 4 more comments. Active Oldest Votes. Improve this answer. The local flatness that you mention only has to hold in a neighborhood of a reference point. As you move to regions that are more and more curved as measured by the Riemann tensor , you become limited to smaller and smaller neighborhoods if you want to see local flatness to a fixed order.
That doesn't mean it's globally straight. The curvature within this neighborhood does not change to make this point the point of no return, as this answer claims. Thus the answer is incorrect along with your comment. Please see my response to Brick above. The curvature is differentiable at the horizon and also can be arbitrary small for very large black holes. Therefore the curvature at the horizon cannot be the reason for the horizon to be exactly there.
There is a different reason for the horizon to be where it is, but this reason is not the curvature at that point. Add a comment. Andrew Steane Andrew Steane The question I would like to clarify is "What if after crossing the event horizon, the body exerts a force greater than the black hole's pull towards the singularity? Again to clarify, the body is not going to travel at the speed of light.
It's going to travel much slower. Let's funnily assume it has a cruise control set at 0. Brick Brick 4, 3 3 gold badges 18 18 silver badges 34 34 bronze badges. My understanding of the question is that the OP also intends for this fuel to be burned for an infinite amount of time and thinks there is or may be some limiting process associated with that to get out.
It is true that a force doesn't necessarily require a lot of fuel but that seems to be a different question. If you interpret the question to have a fixed background as I did originally , then the other answer is right, as noted. Your stone with its fuel may have the bigger effect on curvature if you go to that extreme.
I think that if we agreed on the question, we'd agree on the answer, safesphere. A caveat for the OP still is that, no matter how powerful the engine is, there is no itection to point to that would lead to outside.
It's like escaping from today back to yesterday. For simplicity lets assume it's a hypothetical heavy atom constantly converting its mass into energy and moving out with a speed much less than the speed of light. If the lower rocket does not ascend but the upper rocket does, we can see, observing from a far away position, various reasons for that: 1 exhaust has less mass 2 fuel burns slower 3 force of gravity is larger The third one is less important than the two other ones.
Acccumulation Acccumulation 7, 12 12 silver badges 29 29 bronze badges.
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