black holes expertees wanted?

Question

I've been reading a lot about black holes lately, but I've found
nothing that says they actually exist, like factually. Is this true,
and if so, is there one in the Milky Way?

Answer 1

yes, there are many black holes in the milky way. the biggest is the 3.6 million solar mass black hole at the center of the milky way. this is not speculation. there is proof. astronomers can't observe stars at the center of the milky way in visible light because of interstellar dust in the way. however, they can observe these stars with the infrared because infrared has longer wavelengths so it passes thru the interstellar gas and dust undisturbed. we can feel infrared as radiant heat. you feel it every time you feel warm from sunlight. astronomers put these images made with infrared together in sequence to make an animation showing about nine years. these animations show about fifteen stars. several of these move fast enuff for astronomers to determine their orbits. the mass of the central body can be determined from the speed of the stars and the size of the orbits. the central mass is a supermassive black hole whose event horizon has a radius about 7.7 times bigger than the sun's radius, but its mass is 3.6 million times bigger.

infrared animation:
http://www.astro.ucla.edu/~ghezgroup/gc/pictures/orbitsMovie.shtml

watch "monster of the milky way" here:
http://www.pbs.org/wgbh/nova/blackhole/
http://www.pbs.org/wgbh/nova/blackhole/program.html
http://www.pbs.org/wgbh/nova/blackhole/explained.html

this video is 51 minutes and 10 seconds long:
http://video.google.com/videoplay?docid=6199067060728714818

http://www.mpe.mpg.de/ir/GC/index.php

Answer 2

This is like having a rhino in the room next to you but the door is closed. You can hear it bellow, feel it stamping about and see its horn go through the wall now and then but you still can't say for sure its a rhino. The observations of suspected black holes fit the predictions from theory so they probably exist. There is still work to be done. There definitely is one at the center of the Milky Way or, if not a black hole, some gigantic mass in a tiny space. This can clearly be observed by the orbiting of billions of stars around it.

Answer 3

Black holes are strictly theoretical entities.
The are accepted as fact because some prominent scientists say they exist.
There are some very good reasons why black holes can't exist.
A black hole has never been detected and the galactic center is driven by something other than a black hole,probably by some sort of neutron star activity.
Consider this;a black hole would be a 2 to 3 solar mass entity 3 km in diameter whose gravity would be such that the surface escape velocity would be greater than the speed of light.
It's mass and gravity is concentrated at the center even if you penetrate the surface[event horizon] the orbital velocity below the surface would have to be greater than the speed of light,which can't be.
The escape velocity with any celestial body is less above the surface and also less below the surface.
Space is required to separate any two points,there is no space in a black hole to separate it's center from it's surface.
These are simplistic reasons but there are many more compelling reasons why black holes can't exist.

Answer 4

There are many black holes in our galaxy and others.
In fact the centers of a lot of galaxies, including the Milky Way are filled with super massive black holes. Science is trying to determine why these black holes are currently dormant.

A black hole isn't really black. Steven Hawking proved that black holes give off Verteron particles; called Hawking Radiation, due to the conservation of mass and energy in the universe. Eventually a black hole will evaporate, but we have no idea how this process happens.

Black holes give off radiation, usually x-rays. The particles and matter being pulled into the black hole collides. It is moving fast enough that it can't get out of the way. These collisions produce radiation. Also a black hole can generate a gamma ray burst at the poles, if the black hole is rotating. A gamma ray burst can stretch across the galaxy and sterilize anything in its path. If we were hit by one it would strip the atmosphere away and not kill, but destroy all life on earth.

61 Cygnus is less than 70 light years away and it is considered to be the black hole closest to the earth. At one point Steven Hawking, stopped believing in black holes he made a bet with an astrophysicist that it wasn't a black hole. That astrophysicist proudly displays that dollar to this day. I am not sure how they proved it, but 61 Cygnus is a black hole. 61 Cygnus has a companion star and the loss of matter from that sun helped to identify the black hole.

Black holes destroy things through tidal forces. The gravitational gradient is so strong that a difference of a few feet is important. If you dove head first into a black hole then you would be sucked in to it. As that happened your body would experience the gravity field on it and the gravity field at your head would be stronger than the field at your legs. This would tend to stretch you and break you apart from head to toe; this is the spaghetti effect. If the black hole were rotating and I think most are, then you wouldn’t fall straight into the black hole it would be in a corkscrew pattern.

Light and radiation can escape from items going into the black hole, but the closer to the black hole the harder it is for the radiation to escape, and if a space ship was trying to escape it would have to move faster and faster. At a point called the event horizon the escape speed of the black hole would exceed that of the speed of light; this distance is called the Schwarzschild radius. It would be impossible to get any information on what happens after this event horizon, we would be blind to all events there.

There is a theory that quantum black holes can be created these sub atomic level black holes could be used as a power source or as a means of propulsion. There is no theory on how to make a quantum black hole, but they could have existed after the big bang and some might still be in existence today. One theory of propulsion would be to create a quantum black hole in front of the space craft and then let it evaporate and create a new one a moment later. The succession of quantum black holes would pull the space ship forward and the closer the black hole is the faster the ship could travel.

A quantum black hole would make a great communicator if we could create them and then force them to evaporate. You could send Morse Code messages with the quantum black hole communicator and a more complex one could handle voice like a computer signal does, maybe even pictures.

Answer 5

yes black holes do exist. like someone said their are lots of them. the black hole in the center of the milky way is called a supermassive black hole. its more then 3 millon solar masses. 1 solor mass is equal to the mass of the sun, or 332,950 times the mass of the earth. astronomers have found that in the center of all galaxys their is a supermassive black hole. so it looks like that a galaxie can not exist with out one, but nobody knows what the relashionship is. now think about this (when i read this it blew my mind away) the black hole thats in the center of the andromeda galaxy is 40 times bigger the the one in the milky way! if you want more info read dr. steven hawking. he has done more research about black holes then enyone.

Answer 6

We can't really know for certain if black holes exist due to the fact they are called BLACK holes and space is BLACK. We can though theorize that they exist as we'd be able to see the light being sucked in towards the black hole.

Blackholes are thought to be stars that go supernova and implode in on themselves. To explain further as stars get older, they expand outward, when they have used up all their energy one of two things can happen. One of those two things is that they implode in on themselves, and a black hole is created.

But as said, black holes are black, and so is the night sky so we can't actually see them, but we can see the light being sucked into the black hole by gravity. There are a lot of theories as to if they exist or not, but due to their color it's hard to find them.

Answer 7

Yes, a black hole is suspected to exists in the centre of Milky way galaxy.

Answer 8

A presence has been detected in the center of our galaxy and is believed to be a black hole. I'm not sure that black holes has ever been proven to exist, but many mathematical models prove that when a star runs out of fuel its gravity causes it to collapse on itself, creating a black hole. Einstein's equations also have many loopholes in them, but when filled in with black holes and worm holes they work, which is one more reason they are believed to exist.

Answer 9

there is a black hole in the center of the milky way. if the sun were to become a black hole it would be 7 kilometers wide. a black hole is when not even light can go through it because it is so dense!

Answer 10

I think there can be no doubt that black holes exist, they can't be seen but their influence on bodies that are near them can be detected and their existence has been predicted by famous scientists,