Check this space video out.

http://www.youtube.com/watch?v=mcBV-cXVWFw

I watch this and im completely befuddled just the thought of how many planets there could be i don't have words to express lol.

>we have much more important things to worry about than space >cut to numa numa guy Point taken, space narrator. I will continue to watch your video.cheese_game619

lol i got a kick out of that part of the video also.

lol check this video out also this one makes me scared lol.http://www.youtube.com/watch?v=KDSCnUpyevU&list=UUQkLvACGWo8IlY1-WKfPp6g&feature=plcp

http://www.youtube.com/watch?v=mcBV-cXVWFw

I watch this and im completely befuddled just the thought of how many planets there could be i don't have words to express lol.

Nolan16

[QUOTE="Nolan16"]

http://www.youtube.com/watch?v=mcBV-cXVWFw

I watch this and im completely befuddled just the thought of how many planets there could be i don't have words to express lol.

bbwwoman

Well that's all fine and dandy, but can he spell it?

S, P... ACE!

[QUOTE="chaoscougar1"]That's true, and part of the theory behind warp drives We don't really know what's beyond the event horizon Hypothetical thoughthemajormayor

Have a read of that - Black Holes

That's usually how it's explained in pop culture; that the Event Horizon (EH) is the region past which not even light can escape, and no explanation as to what that means. The thing is, light never slows down within a given medium (it might have a lower velocity in a crystal or water than vacuum, but nothing in that medium can go faster) and gravity doesn't change that. Remember that gravity isn't a force like EM... it's a pseudo-force that's the result of curvature in spacetime. Mass causes spacetime to warp, with the usual 2D analogy being a bowling ball on a trampoline, but it's worth remember that it's in THREE dimensions of space, and one of time in life.

Lets talk about a stellar mass black hole, formed as a result of the usual supernova process; the star collapsed after it "ran out" of nuclear fuel under its own mass. Now, when it became a black hole, the mass didn't change, only the volume in which that mass is contained. If that black hole isn't blasting radiation because it's accreting mass, then you could set up shop at a Lagrangian point just as if the star were NOT a black hole. The problem as it were, becomes evidence only when you get 'closer', and becomes a point of no return at the event horizon. Now, the change that's occurring is a matter of the geometry of spacetime, like replacing a 10 pound bowling ball on a trampoline with a 10 pound 1" ball-bearing. The total mass is the same, but now the trampoline will be experiencing that mass in a MUCH smaller space, so as you approach the ball-bearing, the curvature becomes more extreme.

Lets keep that in mind, and talk a bit about light. Light follows null-geodisics... which we don't need to get into, but remember that light isn't "pulled" by gravity, its path is CHANGED by gravity. Light moves through space at a constant velocity, but if the space it moves through is "bent" (warped, distorted) then it STILL follows its null-geodesic, but now that involves what WE perceive to be a detour. If you could see spacetime the way we can see anything else, then you'd notice light is like a colorful thread running through a white sock; if you move the sock and bend it, the thread seems to bend and curve with the sock its embedded in. If you stretch the sock, it might seem like the thread is longer (light has to go further), but it's ALL what you do to the sock (spacetime), not to light (the thread).

So, we know that a black hole causes more radical warping of spacetime, and we know that light moves through spacetime according to certain rules; the black hole doesn't change those rules but it radically changes the spacetime in its neighborhood. Light that's falling into a black hole is LITERALLY falling, like a satellite around Earth with a decaying orbit, eventually crashing down. In this case, for the purposes of our discussion, the EH might as well be the surface of the earth (it's the limit of what we can perceive) and represents the point at which a decaying orbit and eventual fall becomes something else. Light is effected by ANY mass... any warping of spacetime... stars cause gravitational lensing for instance, it's just nowhere near the extremes that would trap it. If you imagine light in a perfect, massless stretch of space, it would seem to move in a straight line from the point of emission, until it's absorbed by a target. Now, lets say you stick a star in its path, at the just the right position so that the light isn't absorbed by the matter of the star, but still has to move through a region of spacetime that's influenced by the star's gravity. Like the thread in the sock, it will always be moving in the same direct course it ALWAYS was, but the space around it warping means that a null-geodesic is NO LONGER a straight line.

Now, one last point about gravity: the effect of gravity is analogous to acceleration on a body... we know this from our first time in a physics ****oom when we learning that the effect of gravity on Earth is, 9.8 meters per second, per second (9.8m/s/s)... ignoring that just like distance from the bowling ball on the trampoline changes matters, so does distance from the mass of the Earth. That effects light too, but such a puny acceleration (equivalent to the warping of gravity) is a minute fraction of light's velocity, so we NEVER notice it except through careful experimentation. Of course, a BH is so massive and compact that the effect becomes extreme... the acceleration increases until you can fall into a black hole and reach light speed, 'c', 299,792,458 meters per second. The region defined by that curvature, resulting in that equivalent acceleration is what we call the Event Horizon; no event within can ever exceed 'c', so it can never escape. The EH isn't a THING though, and lets not think about what happens beyond it (nobody knows).

Still, space isn't moving like a riptide at 'c' there, it's just so warped that the equivalence in terms of accelerated motion = 'c'. Light, just like the thread in the sock isn't being changed, only the path it takes through spacetime. The thing is, in massless space light has all the Degrees Of Freedom (DoF) possible, but mass begins to put constraints on that. I mentioned light passing a star, and even that "little" thing changes light's DoF from all possible, to a few less by dictating the handful of paths it CANNOT follow. Well, a BH is just that, only far more extreme. As light approaches the EH, the trajectories it COULD take to escape are diminished until at the Event Horizon... they are all gone. The EH defines the region where all possible paths for all possible entities including light, ALL lead to a collision with the singularity at the heart of the black hole. It's not that light has "sped up", or "slowed down"... it's just lost options. The moment at which it passes the EH, it's still moving at 'c', it's just the paths it can take have been so limited that it cannot escape. If light can't escape, and nothing in the universe is "faster"... then nothing else can; the EH is a point of no return for EVERYTHING.

So... it's easier to talk about gravity in terms of a force accelerating mass, but it's not true; it's an equivalence between the effect of gravity that accelerated motion that lets us think about it this way. Newton thought that Gravity WAS a force, and one that acted at a distance through mysterious means. Einstein noted that 'c' was an upper limit on causality, and instead formulated a theory to describe gravity in terms of the geometry of space and time, unified into a single continuum: General Relativity. His theory has shown itself to be more accurate... perfectly so in anything we can observe in fact. It's much easier still, when we're not dealing with large scale structures of the universe, or extreme cases like black holes, to think in terms of Newton. Light appears to be "drawn" into mass by a mysterious force of gravitation, but really it's just following its usual peripatetic wanderings and only its surroundings change. Frame_Dragger

[QUOTE="themajormayor"][QUOTE="chaoscougar1"] Exactly Well one thing is for sure that the escape velocity is FTL. Now I don't understand gravity but apparently this is because space itself moves towards the black hole at FTL sped. Yeah true.chaoscougar1

Have a read of that - Black Holes

That's usually how it's explained in pop culture; that the Event Horizon (EH) is the region past which not even light can escape, and no explanation as to what that means. The thing is, light never slows down within a given medium (it might have a lower velocity in a crystal or water than vacuum, but nothing in that medium can go faster) and gravity doesn't change that. Remember that gravity isn't a force like EM... it's a pseudo-force that's the result of curvature in spacetime. Mass causes spacetime to warp, with the usual 2D analogy being a bowling ball on a trampoline, but it's worth remember that it's in THREE dimensions of space, and one of time in life.

Lets talk about a stellar mass black hole, formed as a result of the usual supernova process; the star collapsed after it "ran out" of nuclear fuel under its own mass. Now, when it became a black hole, the mass didn't change, only the volume in which that mass is contained. If that black hole isn't blasting radiation because it's accreting mass, then you could set up shop at a Lagrangian point just as if the star were NOT a black hole. The problem as it were, becomes evidence only when you get 'closer', and becomes a point of no return at the event horizon. Now, the change that's occurring is a matter of the geometry of spacetime, like replacing a 10 pound bowling ball on a trampoline with a 10 pound 1" ball-bearing. The total mass is the same, but now the trampoline will be experiencing that mass in a MUCH smaller space, so as you approach the ball-bearing, the curvature becomes more extreme.

Lets keep that in mind, and talk a bit about light. Light follows null-geodisics... which we don't need to get into, but remember that light isn't "pulled" by gravity, its path is CHANGED by gravity. Light moves through space at a constant velocity, but if the space it moves through is "bent" (warped, distorted) then it STILL follows its null-geodesic, but now that involves what WE perceive to be a detour. If you could see spacetime the way we can see anything else, then you'd notice light is like a colorful thread running through a white sock; if you move the sock and bend it, the thread seems to bend and curve with the sock its embedded in. If you stretch the sock, it might seem like the thread is longer (light has to go further), but it's ALL what you do to the sock (spacetime), not to light (the thread).

So, we know that a black hole causes more radical warping of spacetime, and we know that light moves through spacetime according to certain rules; the black hole doesn't change those rules but it radically changes the spacetime in its neighborhood. Light that's falling into a black hole is LITERALLY falling, like a satellite around Earth with a decaying orbit, eventually crashing down. In this case, for the purposes of our discussion, the EH might as well be the surface of the earth (it's the limit of what we can perceive) and represents the point at which a decaying orbit and eventual fall becomes something else. Light is effected by ANY mass... any warping of spacetime... stars cause gravitational lensing for instance, it's just nowhere near the extremes that would trap it. If you imagine light in a perfect, massless stretch of space, it would seem to move in a straight line from the point of emission, until it's absorbed by a target. Now, lets say you stick a star in its path, at the just the right position so that the light isn't absorbed by the matter of the star, but still has to move through a region of spacetime that's influenced by the star's gravity. Like the thread in the sock, it will always be moving in the same direct course it ALWAYS was, but the space around it warping means that a null-geodesic is NO LONGER a straight line.

Now, one last point about gravity: the effect of gravity is analogous to acceleration on a body... we know this from our first time in a physics ****oom when we learning that the effect of gravity on Earth is, 9.8 meters per second, per second (9.8m/s/s)... ignoring that just like distance from the bowling ball on the trampoline changes matters, so does distance from the mass of the Earth. That effects light too, but such a puny acceleration (equivalent to the warping of gravity) is a minute fraction of light's velocity, so we NEVER notice it except through careful experimentation. Of course, a BH is so massive and compact that the effect becomes extreme... the acceleration increases until you can fall into a black hole and reach light speed, 'c', 299,792,458 meters per second. The region defined by that curvature, resulting in that equivalent acceleration is what we call the Event Horizon; no event within can ever exceed 'c', so it can never escape. The EH isn't a THING though, and lets not think about what happens beyond it (nobody knows).

Still, space isn't moving like a riptide at 'c' there, it's just so warped that the equivalence in terms of accelerated motion = 'c'. Light, just like the thread in the sock isn't being changed, only the path it takes through spacetime. The thing is, in massless space light has all the Degrees Of Freedom (DoF) possible, but mass begins to put constraints on that. I mentioned light passing a star, and even that "little" thing changes light's DoF from all possible, to a few less by dictating the handful of paths it CANNOT follow. Well, a BH is just that, only far more extreme. As light approaches the EH, the trajectories it COULD take to escape are diminished until at the Event Horizon... they are all gone. The EH defines the region where all possible paths for all possible entities including light, ALL lead to a collision with the singularity at the heart of the black hole. It's not that light has "sped up", or "slowed down"... it's just lost options. The moment at which it passes the EH, it's still moving at 'c', it's just the paths it can take have been so limited that it cannot escape. If light can't escape, and nothing in the universe is "faster"... then nothing else can; the EH is a point of no return for EVERYTHING.

So... it's easier to talk about gravity in terms of a force accelerating mass, but it's not true; it's an equivalence between the effect of gravity that accelerated motion that lets us think about it this way. Newton thought that Gravity WAS a force, and one that acted at a distance through mysterious means. Einstein noted that 'c' was an upper limit on causality, and instead formulated a theory to describe gravity in terms of the geometry of space and time, unified into a single continuum: General Relativity. His theory has shown itself to be more accurate... perfectly so in anything we can observe in fact. It's much easier still, when we're not dealing with large scale structures of the universe, or extreme cases like black holes, to think in terms of Newton. Light appears to be "drawn" into mass by a mysterious force of gravitation, but really it's just following its usual peripatetic wanderings and only its surroundings change. Frame_Dragger

this covers it nicely.

http://www.youtube.com/watch?v=f_J5rBxeTIk

I was hoping James Earl Jones was doing the narration.