I kind of doubt that is correct information since I have heard that there are tiny "black holes" all over the place.

How do you flatter a black hole?




Tell it that it sucks.

There is a striking difference, however, between tiny black holes, that spring in and out of existence everywhere, versus "regular" black holes which we're more familiar with (aka dead star collapses upon itself blah blah blah...).

To answer your earlier question, we don't know whether photons have mass or not. The assumption is that they have no mass because if they do have one, it's beyond our measurement at this point. The reason light gets "sucked in" to black holes is because the space around and in them is so severely warped. Even the gravitational fields around stars causes light to bend. As far as I understand relativity, gravity is the curvature of spacetime. Light travels in a straight line, relative to itself, but because the space in a gravitational field is warped, it causes the "straight" line to become curved. In the case of a black hole, once light crosses the event horizon, that straight line ends at the center of the black hole.

What I find most intriguing is that time is slowed to a crawl - possibly to a complete halt - in such a strong gravitational field. Stephen Hawking's Brief History of Time explains this phenomenon rather well.

Yes this is very interesting. Trying to imagine "warped space" in relation to gravity.

It made me think of stories I have heard about the north and south poles and how airplanes traveling to the north poll will at some point get lost because their instruments go haywire and they no longer work because of a gravity field of some kind. There have been stories of people who have gone into that hole and returned.

Also, there are stories that if you keep walking towards the north pole, (the real north pole) and if it is not frozen over, you all of your compasses will cease to operate. But if you can keep on course and keep walking you will travel into a hole that will take you inside of the earth (Hollow earth stories) and that you will be able to walk on the inside of the earth's core. Imagine that the north pole is a "black hole" of some kind and you can walk into it.

Some say that the force of gravity is within the earth's core, and not necessarily at the center of the earth, and that people live in the "inner earth." I find these stories very intriguing. They say that Hitler believed this too and was planning on going into inner earth.

Try to picture a flat latex membrane, with a heavy sphere sitting in it. You'd notice how the membrane stretched evenly down to the sphere. Now imagine that in three dimensions instead of two,



That's the Magnetic North Pole, rather than the true North Pole. It's 11 or so degrees off from the true North Pole. It's not a hole, but much like when you stick the end of a magnet over the middle of a compass, traveling over Magnetic North (or South) Pole will cause your compass to cease to function properly.

I back up these statements with a potentially-unreliable reference:
http://wiki.answers.com/Q/Will_a_compass_work_at_the_south_pole



It's not. There have been a number of flights over both the North and South poles.



The force of gravity is caused by Earth's mass and its consequent warping of spacetime. It doesn't emanate from a locatable source.

The idea of an "Inner Earth" is, quite frankly, ridiculous, as anything that deep in the Earth would quickly be killed by the heat. Hell, you can die of overheating in some diamond mines, let alone a subterranean world further below the surface than the bottom of the sea. Not to mention none of the seismic images of the Earth suggest anything but a solid (excluding the mantle and outer core, which are liquid) planet.

The idea that the inner earth is full of molton lava is a farce. I just don't believe it. There could very well be many hollow places that are not. Hell scientists have not even studied enough about what is in our own oceans and on our earth, they aren't close to knowing what is inside of the entire earth.

WRONG.

MASSIVE jets can spew out MASSIVE quantities of super charged particles from super massive black holes. Enough to disturb WHOLE star clusters if pointed in the direction of said clusters. Id say that is pretty detectable, especially considering we have detected it . . . .

In fact some black holes can devour and spit out the equivalent of many earths a minute.


Abra the great pretender!!!!! Weighs in as if an authority!!!!!


http://www.washingtonpost.com/wp-dyn/content/article/2007/12/17/AR2007121701266.html

As far as creating other universes that is a whole other concept, which is what the poster was probably referring to before your presumed authoritarian response which really said nothing about his post.

http://www.newscientist.com/article/dn11745

Try to actually bring something to the conversation next time abra, like showing us some research or articles ect, instead of your own laymen garbled understanding of cosmology.

Really serious do something other then spout, it only took me 2 minutes to find an article about what he was referring to.

Google, its whats for dinner.

Vastly different sciences using vastly different techniques cannot be compared for relative knowledge. Seismic imaging and data have given us a VERY accurate description of the Earth's interior. One way or another, it is certainly NOT hollow.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC411539/

This should give you more information.

Right on, the data just does not support a hollow earth, pure fantasy.

If they studied philosophy, or set theory, then they know. This is what they know:

There is nothing inside the entire earth.

Proof:

For something to be inside another thing they have to be delienable from each other. An example of such would be a key in a box: The box has its extent around some hollowness, and in that hollowness is the key, separate from the surrounding box.

If there is no separation of being between the outside part of an object and the inside part of an object, then we do not state that the inside of the object is inside the object. It is part of the object, and conceptually something cannot be inside of itself. It can, in set theory, but in language it cannot. In set theory when we state that something is inside of itself, we mean that the entire set contains the entire set. If we insist that the entire set contains parts of its own self which is not the entire set, then those smaller parts are not the set itself. The smaller parts are different entities.

When we say "entire Earth" we mean its fullness. Inside of the entire Earth which is the entire Earth can only be itself, that is, the entire Earth, as per the set theory.

If we ask, What's inside the entire Earth (eE), and we mean parts of the Earth we don't know, then the only correct answer can be, "nothing", since the only thing that eE can contain is eE; but the question presupposes that it's not eE that we don't know what is inside eE. Therefore the thing that is inside eE does not exist, therefore there is nothing inside eE (but itself). But we already know that, namely, that eE is inside the eE. Therefore there is nothing else there. Thefore we know what is inside eE, and the answer is nothing. QED.

I hate to be rude or to appear as a complete nitpicker, but this IS the philosophy forum.

I think they should put big, red, blinking warning lights on black holes, so that you can run away when you see one approach, and therefore it won't swallow you up.

in every black hole,there's a man with a flashlight looking for the light switch......

By definition, nothing can “come out of” a black hole. Period.

I’m no physicist, but I do know that much.

Now as I understand it, the energy being “spewed out” by black holes is caused by matter being torn apart by the gravitational field near the event horizon.

But that has nothing to do with the “disintegration” of black holes that Abra was talking about.

I think “pretender” and “authority” need some revaluation here.

Well I don't think the earth is completely "hollow" but I do think there could be hollow areas. I would like to learn more about how much they do know and how extensive the knowledge is.

Quote from website: Note the bold part.




Therefore Abra appears to be correct that the actual black hole does not spew out anything. To be specific, he said "In fact, nothing emerges from a black hole directly."

According to the website Bushidobilllyclub posted, apparently the bursts of energy comes from the matter that does not make it into the black hole that is swirling around the black hole.

So, Bushidobillyclub. if you are going to "bring something to the conversation," from google maybe next time you should actually read the whole article, and then re-read what Abra actually did say before you "spout."

ah jeez bean. now you're really reaching into that spirit world for answers. having piloted jets for decades over or near the north pole i can assure you that there are no "gravity fields" or "holes" that people have gone into and returned. other than the very slight difference in the force of gravity we feel at the poles relative to the equator that can be accounted for by centrifugal force of the earths rotation the effects of gravity are the same everywhere on earth. i think you're confusing gravity holes with magnatism. the poles are magnetically charged, not going into why, and that does have an effect on a compass and thereby navigation has been an issue in the past but no more. magnetic compasses are rarely seen in aircraft today so you'll be quite safe flying to vladavostok.



you do realize that we've been to the "real north pole" do you not? most refer to real north as true north but what's a few semantics when talking science stuff huh? other than the melting ice caps there are no "black holes" at the poles bean. how do we know that? because we've been visiting the poles for over a century. magnetic north and true north are offset by several degrees depending on where you are located on the planet. a compass points to magnetic north, a magnetic heading, and an inertial navigation sensor and related flight management computer will point to true north, the actual north pole of the earth's axis.



well hell, if hitler says so...........................

wow there is a lot of semi understood science in here. and the rest stitched together with esoteric fanstasy

as far as I know it's pretty well accepted that every galaxy has a black hole in the center. and many of them are quasars. They may all be quasars but we can only measure the ones pointed directly at us. the gas and dust and stuff in space speeds up in a whirlpool effect so fast that it becomes super heated forming a plasma. This plasma is ejected at the poles of the quasar. This plasma jet can extend hundreds and sometimes thousands of light years


most quasars are spinning, some at hundreds of times per second. we can only measure the ones that happens to be pointed at us but the energy from the plasma jet can illuminate the dust and gas in the space around it as in the case of the crab nebula

at the core of the earth is liquid iron and metal heavier to the center and lighter at the outer edges.

as the earth spins the differences in viscosity and weight cause the layers to spin at different speed. The result of that is a giant dynamo effect giving us an electromagnetic field that deflects the cosmic rays from the sun. we couldn't survive without it

in Mars, being much older, the center has cooled and there is no electromagnetic field

Awesome pictures.

I wonder then, if Mars is considered a dead planet, or if it is just a senior citizen.

haha it's pretty much dead. the lack of the electromagnetic field has allowed the force of the cosmic rays (the radioactive debris from the suns fusion process) to strip away it's atmosphere. So it has gravity but no electromagnetic field or atmosphere.

But maybe some liquid water. If there is water there we can build settlements. Prolly domed or underground.

( my own personal belief is that if we, as a species, don't get off this planet we are doomed to extinction. So Mars is the next best step to take)