Black holes are regions in space created by the death of stars. Their gravitational field is so strong that even light cannot escape from it.
Black holes are regions in space created by the death of stars. Their gravitational field is so strong that even light cannot escape from it.
If you enter a black hole, no matter what the speed, you will be sucked into the center of the black hole, and utterly destroyed.
No. For a typical, stellar mass black hole, tidal forces would rip you apart long before you reached the event horizon. Tidal forces are weaker at the event horizon of a supermassive black hole, but you would be killed by an even stranger effect. Time goes slower closer to the event horizon in what is called gravitational time dilation. To someone falling into a black hole, it would seem as if the universe around them… Read More
1. The black hole would directly release Hawking Radiation. This is a very weak radiation that is difficult to detect, and has not yet been confirmed experimentally. 2. Indirectly, radiation (like X-rays) from any object falling into the black hole, caused by a great acceleration.
White holes, according to general relativity are, simply, the back ends of black holes, which are permanent holes in spacetime, so... no.
If you mean that somehow the black hole can be removed or flung out of the galaxy than, no it can't, because the galaxy (or more specifically all the stars, gases, and asteroids, and dust clouds) orbit around the central black hole in a galaxy, they are just moving to fast and to far away to be pulled into the black hole, and if a black hole where to move the surrounding stars and debris… Read More
Yes. You see, a supermassive blackhole constantly eats away at the galaxy it inhabits. but for clusters the gravitational field is so immense, it already is pulling whole galaxies into its singularity. An example could be that our galaxy, as well as others are being pulled to a phenomenon known as The Great Attraction which could very well be a supermassive black hole.
Most galaxies have a black hole at their center.
The Big Bang theory does indeed suggest that the begining of the Universe was a singularity - an infintesimally small region where the entrie Unverse was concentrated. A singularity is also thought to be at the centre of a black hole.
Both have a large mass concentrated in a small space. Both are the result of the collapse of a fairly massive star - although in the case of a black hole, other mechanisms have been considered, too.
A black hole is a collapsed star that has a gravitational pull that is so strong that light itself can not escape from it. We can they exist by the impact they have on the objects near them.
They can be classified according to whether they rotate or not; their electrical charge; but especially their mass.
The Large Hadron Collider is the world's largest particle accelerator at 27Km in circumference and is situated 175m below the Earth's surface.
Black Hole is the enemy army and organisation in many advanced wars games, including: advanced wars black hole rising, and advanced wars dual strike.
Black holes get their power from the planets they consume.
No, black holes move.
Because the stellar remnant has no more fuel to burn and any residual heat left over from when it was a white dwarf has left. In fact it should just be called a cold rock. See related question.
No, a black hole is not some sifi mysterious thing that causes unknown things to occur, like complete realities. It is simply a massive source of gravity, so massive that light cannot escape it.
Although this is comparing an event to a massive body, for convenience a comparison could be made using the common currency of energy. The most powerful gamma ray burst ever recorded, detected by the Fermi gamma ray space telescope in 2008, was a little less strong than six thousand supernovae, about 9 x 10^47 joules of energy. If you turned that into mass, per Einstein's famous formula E = m c^2, you'd have about 5… Read More
Black holes could be said to do the same thing to time as do other sources of gravity, only to a more extreme degree. In General Relativity, which was Einstein's theory of gravity, he proposed that space and time were equivalent and merged into a single entity - spacetime - and the effect of gravitation's influence was a local curvature in spacetime. His predictions were verified with accurate chronometers at sea level experiencing the higher… Read More
Solar collectors are black as black absorbs the most heat, it does not reflect light/heat like other colours but absorbs it.
A black hole is the stellar remnant of a star that went supernova. See related questions
A black hole is so dense and has so much GRAVITATIONAL pull that not even light can escape it
Quite on the contrary - it's so dim that we can't see it: no light escapes from the hole. The only emission indicating presence of a black hole may come from accreting matter surrounding a hole. Although Hawking's radiation is associated with event horizon, it is undetectable at such distances.
When exposed to the sun, fair skinned people tend to develop more melanin in their skin to help protect them form buring. This makes their skin darker (called a sun tan), however when exposure to the sun stops, the skin will lose the tan. Therefore the answer is No.
No, it is a red supergiant star.
Black Holes don't give off radio waves. They emit X-rays. This happens rarely since the black hole's gravity is so strong that it doesn't allow photons to escape.
You are constantly going into the future, no matter what you do. All objects with mass slow down time, though most only do so to a very minor degree. Black holes, however cause significant time dilation. If you were to go near a black hole (though not actually enter it) you would see the universe outside the black hole go by faster, so you could, theoretically, you could go further into the future faster than… Read More
The basic idea is that masses attract one another through a force called "gravity", and that such a force depends on the amount of mass, and the distance. It is possible to have such a large mass in such a small space that even a ray of light can't escape from such a region, due to the gravitational attraction.
The black holes gravity are much stronger and faster than the speed of light, so light can't escape from the Black hole.
The main characteristic of a black hole is that it traps light. So light can be in a black hole, but we just can't see it.
From the black hole itself? Nothing. No matter or energy can escape from a black hole. From the accretion disk AROUND the black hole, where matter is accelerated to light speed at the event horizon? All possible frequencies of electromagnetic radiation can be emitted from the accretion disk, but the typical "signature" of a black hole is mostly hard X-rays.
A dead star. The dead star's smashed atoms come together, and are crushed again. This births a black hole
because it takes a very large and massive core to pull on itself enough to shrink.
No. Only planets have weather: It can't rain in space.
Light is affected by gravity much like ordinary matter is, but it is moving so fast that the effects are small for most object. The path of light will be bent toward a massive object as it passes. A black hole has so much mass compacted into a small area that the path of light is greatly bent. At such close distances the mass of the black hole greatly distorts space and time. Within a… Read More
A black hole would eventually swallow up the entire Earth. An asteroid would provoke great catastrophes - depending, of course, on the mass of the asteroid.
no, a black hole is just to massive and pulls its self into an infinitely small point.
These are interesting conjectures, but there is no way to determine if any of them have any validity. My own favorite unprovable hypothesis is the Big Bang/Big Crunch of a cyclical universe; everything in the universe eventually falls together in a Big Crunch, reaching infinite density, and a rebound effect causes the collapsed universe to explode into a new Big Bang - to be followed some uncounted billions of years later by another Big Crunch… Read More
Not quite. Remember that darkness is simply the absence of light. If you flipped a lightswitch in a closed room the light turns off, and it goes dark. The reason that is is because the lack of a light source. Some animals can take that lack of a lightsource and see using infrared visuals. They DONT emit a red light so darkness is still set there, but they can see through the darkness. The reason… Read More
The temperature of a black hole is measured from the level of radiation coming from that black hole. The more radiation is given off by the black hole, the hotter it will be. If the black hole was the mass of our sun, the radiation given off by the black hole would only amount to about one ten-millionth of a degree above absolute zero (0K or -273.15°C). The more a black hole weighs, the less… Read More
The mechanism by which black holes can emit energy (and thus, per matter-energy equivalence, decrease in mass) was proposed famously by Stephen Hawking who realized black holes would interact thermodynamically with the universe and have a finite entropy and temperature. The model supports more than one interpretation, a common one is that quantum fluctuations at the subatomic level are boosted by gravity such that virtual particles can become real; the particles are produced in pairs… Read More
You can. Its just that u will be compressed about 1 million times, and it's gravitaional force is so great not even light can come out.
Not at all. It is quite well lighted, and in fact looks blue from space.
Impossible to know currently, and the answer may NEVER be known. We cannot be ABSOLUTELY certain that there are ANY "black holes", but there is substantial - but circumstantial - evidence of several, and suggestive evidence of many more, including a super-massive black hole believed to be at the center of the Milky Way galaxy. The problem is that a black hole is inherently undetectable by any method except by its gravity. Since we aren't… Read More
The strong nuclear force is indeed the strongest of the fundamental forces but it has upper limit as there is a minimal distance that the nucleotides can achieve and a limit on how many of them can be combined together. With gravity there is no minimal distant, all the mass can collapse to a singularity. (There may as yet be some undetected quantum state that we haven't as yet observed. It's hard to imagine a… Read More
If you ate, or seriously attempted to eat, 400 carrots in one hour, you wouldn't be doing much beyond chumming the porcelain sea. And the color you'd be seeing would be closer to orange than black.
By saying that the ether hole and the multiverses are real, you've already specified the parameters of the fairy tale, so why stop there ? Just go ahead and make up the rest of the story, whichever way you'd like to see it come out.
What do you mean? "Gravitational pull" and "gravity" is the same thing.
No, dark matter is quite a different kind of thing. A dark hole may have absorbed some dark matter, but pressumably that would become indistinguishable from the normal matter, once it gets crushed by the enormous gravity of the black hole.
Light can certainly fall into a black hole, but once it crosses the event horizon it can never exit, thus, it can't "pass through". The gravitational force inside a black hole is such that the escape velocity exceeds the speed of light. The event horizon marks the boundary at which the escape velocity is equal to the speed of light; thus neither light nor matter could pass through it since neither could exceed light speed.
There is a lot of evidence that they do, indeed, exist.
First off ,from beyond what we can see and beyond is only a theory.The Hubble Has discovered many new things in our galaxy, and other galaxies.But the black hole is "the theory of relativity."Which came from albert Einstein. So that's the theory of what it looks like.
No. And the term is "black hole," not "dark hole."
The size of the black hole - that is, the diameter of the event horizon - will increase if the mass of the black hole increases. Over time, black holes normally do gain extra mass from attracting it through gravity. However, they can also lose mass via Hawking radiation and eventually evaporate. Hence, the age of a black hole has little relevance to its size.
In theory.. No. In order to escape a black hole one has to move faster than light. In order to move faster than light one would need an infinite amount of energy. Also, your mass steadily increases the closer you get to the speed of light. Thus the infinite energy cost... Lets not forget that you would be dead once you entered a black hole. :-P
There is likely a large black hole in the middle of the galaxy, however, the galaxy is not a "finish black hole"
No. The extreme temperature of the sun would incinerate a human body much before a person could go on the sun.
Everything around us is is the universe. From you to the very edge of known space is the universe. It's simultaneously right here and everywhere else. If your question was how distant is the edge of the universe, there is no answer to that because the universe is constantly expanding and the edge is always rocketing away from our position.
Black holes do slowly "evaporate" through something called Hawking Radiation. The process is extremely slow and the bigger the black hole the slower it becomes. A black hole the mass of the sun would take about 2x10^67 years to disappear, which is many orders of magnitude greater than the age of the universe.
Kind of. They go dormant if their is nothing in their surroundings to absorb. They have a constant swirling cloud of dust and gases if they are active, but they are simply a black orb if they are domant.
No one really knows. What has been observed and conjectured is that mass is decomposed, rearranged, and confined within an accretion disk of plamsa energy.
No. Even a supermassive black hole is nowehere near large enough to swallow a galaxy.
In a way, it doesn't. Since no light can escape from a black hole, and the black hole will only emit an insignificant amount of Hawking radiation, it doesn't really "look like" anything. It can only be detected indirectly. If matter falls into the black hole, such matter will emit copious amounts of x-rays (before reaching the event horizon). Also, the black hole affects the movement of nearby objects. For example, stars can be seen… Read More
That is called a black hole.
The closest known black hole is at a distance of about 3000 light-years. So, it would take 3000 years to get there at the speed of light, 30,000 years at 1/10 the speed of light, etc.
Not quite sure what you mean, but black holes are among the brightest objects in the Universe, and they seem to play an important role in the evolution of a galaxy. For some more interesting information, you may want to read the Wikipedia or some other source about: Black hole Supermassive black hole Quasar Active galactic nucleus
It would be torn apart by tidal forces as it approached the black hole. Once it crosses the event horizon id disappears into the black hole forever.
No. The black hole is at a safe distance from us.
A blackhole is formed in our universe when matter falls onto the black hole and that forms an accretion disk that is heated by friction. The black hole does not allow anything to escape it.
Although it is not directly observable, general relativity predicts that at the center of a black hole is a region of spacetime called a gravitational singularity, which can have peculiar properties such as infinite density of matter, zero volume, or infinite space-time curvature.
Black holes have remarkably few properties (see No Hair theorem), and once an object disappears behind its event horizon, it's not really possible for an outside observer to deduce its characteristics. However, there are some properties that are preserved, such as charge, mass, and spin - or intrinsic angular momentum. If you add a frame of reference, a black hole will behave in ways like other mass - it can have a linear momentum, and… Read More
Well Albert Einstein said that time and space are the same thing so he just called it spacetime and black holes bend and warp space so time gets warped to.
i was doing this project for school. here was the info i found. black holes are black because no light can escape. because of that they are invisible. to see a black hole scientists use space telescopes and special tools to look at the stars. stars orbiting black holes act differently than other stars.
Portals made from black holes are highly speculative. You are more likely to encounter such portals (usually called wormholes) in science fiction (because it suits the plot), than in serious astronomical literature.
ordinary - the only property this has is mass spinning - this has the properties of mass and spin charged - this has the properties of mass and charge Note: you can also have black holes with all three properties: mass, spin, and charge. but these are not considered a separate type, just a combination of 2 and 3.
No. The sun does not have enough mass to become a black hole. When the sun dies it will become a white dwarf.
By under control, I assume you mean keeping it from drifting around, accreting everything in its path. The only way to do this (And is naturally done) is to keep it orbitting its parent star/galaxy. Stars naturally continue orbitting their parent after collapsing into a black hole.
aah. Astronomers knows because of its effect. Black holes distort lights and it sucks planets and stars into it, so if they see many many stars start to disappear, then that must be the Black Hole action. and sometimes stars incourse of their celestial motion go on diffrent velocity than they should..... like when they slow down unconditionally or get accelerated there remains no explanation but a black hole. also for binary stars who rotate… Read More
Because it's to have sex
No. A black dwarf is dense and has the mass of an entire star, so the gravitational pull would still be quite strong.
None at all. One is an exploding star, the other is a large star at the end of it's life, and the last two are stellar remnants resulting from a supernova explosion
the weather instadute
It was first proposed in 1783 by John Mitchell of the Royal Society and later "rediscovered" by Karl Schwarzschild as a possible result of Albert Einsteins theory of general relativity.
There have been a few prominent Indian cosmologists who have worked on black holes but you are probably thinking of Jayant Narlkiar.
The whole idea of black holes is that nothing, not even light, can escape from them. However, there are several indirect ways to detect them.
Sure, Earth has caves for example. But presumably you mean deep inside. That's not really possible, at least, not in a large planet such as Earth, since such a hole would quickly collapse due to the immense pressure of the material above it.
A blazar is an elliptical galaxy with a supermassive black hole at the center.
There are no "cycles". A black dwarf star is the final stage of a white dwarf - a white dwarf that has cooled down so much that it no longer emits significant amounts of radiation. The Universe is currently too young to have black dwarves; white dwarves are expected to become black dwarves in the far future.
The mathematics of a black hole itself does not require them. However matter around them will tend to orbit the black hole before eventually falling in, this creates what is called an accretion disk which could be considered a "ring". There is also strong evidence that all spiral galaxies contain a super massive black hole, if this is indeed the case then the entire disk of such galaxies could be considered a second "ring".
They took it down because it was inappropriate
The black holes from Gamma ray usually burst because of their energetic form.
If enough matter gets concentrated into an area that is small enough, gravity can become so strong in the immediate surroundings that nothing can escape from that area. That is called a "black hole". For more information, read the Wikipedia article with the title "black hole".
Simply because there is none close enough to do that.
This is known as the Schwarzschild radius. It is approximately 2.95 km per solar mass.
Black holes are thought to have been around since the creation of the universe.. the very events that formed it may have created some. However, there is not much proof of the age of any specific black hole and the difficulty of applying research to them outside the theoretical realm may mean that proof will not be forthcoming any time soon. Since they tend to accumulate mass through their powerful gravitational fields likely they will… Read More
Are you planning to destroy planet Earth, or what? - Anyway, this might not be possible at all.
1970 - Stephen Hawking's essay titled "Black Holes" won the Gravity Research Foundation Award in January 1971.
What happens here is that while the star is converting energy through nuclear fusion, the inward force of gravity is countered by (a) the gas pressure, and (b) the radiation pressure. However, once the nuclear fuel burns out, there is no more radiation pressure; and the gas pressure by itself is not enough to stop the collapse. Thus, the star will collapse - into a white dwarf, a neutron star, or a black hole, depending… Read More
I think that's unlikely. The only relevant features of black holes are its mass, electric charge, and rotational momentum. What makes dark matter different to baryonic ("normal") matter is that it doesn't interact with normal matter, except through gravity - so it seems that none of the differences would be relevant, once such matter is converted to a black hole.