A question of Black holes.

[alokmohan]

Frankly our knoeledge of singularity is limted.It own physics is in the language of John Wheeler a fiery marrige of relativity and quantum mechanics called quanum gravity.To understand it see John Wheeler ,who coined the term black hole.

 

[alokmohan]

Daniko,you have potentia to tap.Read degeneation of matter .You can poiost so much.

 

[alokmohan]

Enigma,where are you?No more black hole?

 

[delster45]

Could all the black holes in the universe eventually merge?

 

[alokmohan]

Theoritically and logically it is not barred.There is a famous saying that whatever is not barred is compulsory .The story of white ants fiction.

 

[R1]

they may be able to, how well I don't know, I would think it depends on the <br />current situations inside the holes. <br />but I have thought 2 equal singularities may not ever be able to finally touch each other, because of each one's space-time distortion, the space between them<br />and the virtually stopped time.<br /><br />Andromeda will collide with The Milky Way, it is expected that they will combine<br /><br />could this collision have anything to do with supermassive black holes in the centers?<br />or is it pure coincidence that of all the places in the Universe Andromeda and The Milky Way could have flown off to they chose to merge?<br /> <div class="Discussion_UserSignature"> </div>

 

[alokmohan]

It is a theorical discussion.Since the existence of black hole is theoritically possible only,in fact some scientists donot accept the idea of a black hole,we may not lose our sleep.Sleep peacefully in the name of John Wheeler.

 

[control_group]

<blockquote><font class="small">In reply to:</font><hr /><p>could this collision have anything to do with supermassive black holes in the centers? <br />or is it pure coincidence that of all the places in the Universe Andromeda and The Milky Way could have flown off to they chose to merge? <p><hr /></p></p></blockquote><br /><br />Both. Gravitation between the two galaxies will pull them together, just like any other two objects with gravitational mass. At large distances, of course, this pull is offset by other factors. But it's an effect of gravity, not necessarily of the black holes. From sufficiently far away, a black hole is, after all, (gravitationally) indistinguishable from a star (or anything else, really) of the same mass. Andromeda doesn't "know" there's a black hole at the center of the Milky Way (assuming there is).<br /><br />So it's a function of proximity and chance. The two galaxies chanced to be close enough and with the appropriate relative velocities to set them up for a collision; gravity provides a degree of "steering" to help insure that it's not a near miss. So, it's a rather large coincidence that Andromeda happens to be so close.<br /><br />But I don't think it's such a large coincidence that <i>some</i> galaxy happens to be so close.

 

[alokmohan]

Why andromeda only?None knows if there is a black hole at center of andromeda.All speculation.

 

[enigma10]

speculation governed by indirect observation. Eventually, we may have enough of that to equate with other forms of indirected observations we today call mistakenly facts. Like how the sun works. Think we've <b>directly</b> observed that? <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>

 

[alokmohan]

Not clear.

 

[alokmohan]

Our galaxy's supermassive black hole is responsible for the mysterious gamma-ray emission from the galactic centre, a new study suggests. Churning magnetic fields around the monster black hole may act like a giant particle accelerator, leading to high-speed collisions that produce the gamma rays.<br /><br />Extremely energetic gamma rays, with energies in the tens of tera-electronvolts (where 1 TeV is 1012 eV) have been detected streaming from our galaxy's centre recently by ground-based gamma-ray observatories such as the High Energy Stereoscopic System (HESS) near Gambsberg, Namibia.<br /><br />How such high-energy gamma rays are produced has been a mystery. Some scientists have proposed that it is the result of dark matter particles decaying, but others are not so sure (see Astronomers claim dark matter breakthrough).<br /><br />A new analysis suggests that the gamma rays are due to a naturally occurring particle accelerator more powerful than the best atom smashers employed by physicists on Earth.<br /><br />Magnetic luge<br />David Ballantyne of the University of Arizona in Tucson, US, led the team that carried out the new study. They made detailed calculations based on the particle accelerator scenario, which was proposed in 2004 in a study led by team member Siming Liu of the Los Alamos National Laboratory in New Mexico.<br /><br />In this scenario, protons in the vicinity of the supermassive black hole at the galaxy's centre are constantly buffeted by the roiling magnetic fields there. These magnetic interactions accelerate the protons so much they escape the supermassive black hole's grip and are flung into surrounding gas clouds.<br /><br />The magnetic field associated with the black hole extends even farther away, so it continues to kick the protons to even higher speeds as they travel outwards. <br /><br />Some of the protons could reach energies of 1000 TeV this way, says team member Fulvio Melia of the University of Arizona, in Tucson, US. That is about 100 times hi

 

[enigma10]

<i><font color="yellow">Why andromeda only?None knows if there is a black hole at center of andromeda.All speculation</font></i><br /><br /> http://www.space.com/scienceastronomy/050920_andromeda_stars.html <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>

 

[alokmohan]

We canot definitely bet to say that black holes exist.But applying rules of general theory we may say that most probably black holes do exist.There are talks of quark stars also.High stuff .But Whheler is confident that black holes exist.He christened the name.Same with Kip Thorne.

 

[imverygood_0000]

is it possible that we can travel to our past through blach holes if they exists

 

[alokmohan]

If worm holes exist we can.Kip Thorne says worm hole is possible and pemitted by general thory of relativity.You may time travel forward or backward.

 

[saurc]

Although it is impossible to observe a black hole directly, enough evidence has been gathered that they do, indeed exist. However I do not know if there has been conclusive evidence, or even theoretical justification of wormhole timetravel. There are lot of contradictions in time travel, as well.

 

[alokmohan]

Worm hole is permissible as per General theory of relativity.Kip Thorne is working on it.Dont be so sure about existence of black hole.Many scientists have other opinions.But most probably black holes exist.

 

[onesimple]

Lets take a look this videoclips and then you know more about black holes.<br /><br />http://www.onesimpleprinciple.com/24<br /><br />

 

[alokmohan]

Onesimple,it is not simple.What is the language?What is the matter in a nutshell?

 

[onesimple]

Dont worry language. Just take a look videoclips. We have a english text over there!!!<br /><br />http://www.onesimpleprinciple.com/?lang=1&noflt=1&haku=%5Bvideo%3A<br /><br />

 

[enigma10]

yawn. Before you solve the universe, please translate it. <img src="/images/icons/rolleyes.gif" /> <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>

 

[alokmohan]

Photo release: The colourful demise of a Sun-like star <br /><br />A brand new image taken with Hubble's Wide Field Planetary Camera 2 shows the planetary nebula NGC 2440 - the chaotic structure of the demise of a star. <br /><br />This image, just taken by the NASA/ESA Hubble Space Telescope, shows the colourful "last hurrah" of a star like our Sun. The star is ending its life by casting off its outer layers of gas, which formed a cocoon around the star's remaining core. Ultraviolet light from the dying star makes the material glow. The burned-out star, called a white dwarf, is the white dot in the centre. Our Sun will eventually burn out and shroud itself with stellar debris, but not for another 5 billion years. <br /><br />Our Milky Way Galaxy is littered with these stellar relics, called planetary nebulae. The objects have nothing to do with planets. Eighteenth- and nineteenth-century astronomers called them the name because through small telescopes they resembled the disks of the distant planets Uranus and Neptune. The planetary nebula in this image is called NGC 2440. The white dwarf at the centre of NGC 2440 is one of the hottest known, with a surface temperature of more than 200,000 degrees Celsius. The nebula's chaotic structure suggests that the star shed its mass episodically. During each outburst, the star expelled material in a different direction. This can be seen in the two bowtie- shaped lobes. The nebula also is rich in clouds of dust, some of which form long, dark streaks pointing away from the star. NGC 2440 lies about 4,000 light-years from Earth in the direction of the constellation Puppis. <br /><br />The material expelled by the star glows with different colours depending on its composition, its density and how close it is to the hot central star. Blue samples helium; blue-green oxygen, and red nitrogen and hydrogen. The image was taken 6 February, 2007 with Hubble's Wide Field Planetary Camera 2. <br /><br />Notes for editors <br /><br />The Hubble Space

 

[alokmohan]

Black hole is only one case of sun demise,sun is very big.

 

[enigma10]

w t... 0.o<br /><br />one post you're almost text book, then you post random junk like this? I get the impression there is more than one person using your account. <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>