[ShadowAce]

Science ping

[big'ol_freeper]

Ping

[Fiat volvntas tva]

I disagree. Black holes do exist. Just look in Michael Schiavo's eyes.

[peyton randolph]

Sounds like someone is picking a fight with the guy in a wheelchair...only in this case, the guy is Stephen Hawking. When in doubt, bet on Hawking.

[billorites]

[zencat]

It has always seemed to me that humans (being a part of the universe) cannot understand the whole. It's like try to catch a shadow.

[Crazieman]

This is wrong.

Dark energy is an expansive, repulsory effect. This would negate the effects of a collapsing star if there was some sort of "transition"

[lilylangtree]

What if Einstein had math anxiety? Would black holes be discovered earlier?

[billorites]

It's black and it looks like a hole. I guess it's a black hole.

[Ditter]

I am so glad to hear this because I have been VERY worried. <;9//>

[Michael_Michaelangelo]

Posted a few weeks ago...

Black holes 'do not exist'

[NonLinear]

In general relativity, there is no such thing as a 'universal time' that makes clocks tick at the same rate everywhere. Instead, gravity makes clocks run at different rates in different places. But quantum mechanics, which describes physical phenomena at infinitesimally small scales, is meaningful only if time is universal; if not, its equations make no sense.

I disagree. Different velocities with respect to other inertial frames makes clocks appear to run at different rates when viewed from different reference frames. Location has nothing to do with it, except when the location places one frame under an acceleration with respect to another. Then it is not the location, per se, but the proximity to some other influence.

If the author screwed this up so badly, can we really trust his conclusions?

[Egon]

"My head hurts" ping.

[meandog]

Black holes are staples of science fiction...

...Poppycock! I saw one run for the presidency not a year ago, and his name was Rev. Al Sharpton.

[Sleeping Freeper]

I don't know why, but I just love this stuff. The space time continuum stuff and the infinite event horizon without black holes makes Star Trek much more plausible.

[webheart]

Oh, pshaw. This guy is trying to get attention. He talks like his alternative is the only answer.

I don't know for sure that black holes exist, but if enough mass accumulates in one place, all the electrons will get squished into protons, and you will end up with densely-pack neutrons, kind of like a huge atomic nucleus. As more mass accumulates, you have to wonder whether those neutrons can hold up under all the pressure. I doubt it. So they will get squished even more.

Gravity as a force is such that it is greater when masses are close together, so the smaller the space the mass occupies, the greater the attraction that mass will have upon itself.

I assume that if the mass gets too much for physical neutrons to withstand, somehow they must cease to exist, but the mass does not go away, and so neither does the gravity. Thus we end up with a collapsing mass whose gravity increases as the mass gets smaller.

Of course, that whole thing about time stretching out and speeding up, the collapse could, once it began, be completely finished in a few microseconds, if that. But since the time as we observe it is stretching out, what would be seen from outside would be really really long, maybe even infinite. But that is the essence of what a black hole is. In my humble layman's opinion.

[WKUHilltopper]

Interesting...but I thought time was manipulated by "speed", not specifically location. Or maybe I've got this "flip flopped". Never had this stuff in "skool" but it's interesting nonetheless.

[hosepipe]

[ Black holes 'do not exist' ]

Really.?... (bending over)...
SEE...

[Protagoras]

the Universe could be filled with 'primordial' dark-energy stars. These are formed not by stellar collapse but by fluctuations of space-time itself, like blobs of liquid condensing spontaneously out of a cooling gas. These, he suggests, could be stuff that has the same gravitational effect as normal matter, but cannot be seen: the elusive substance known as dark matter.

That's what I always thought.

[SJSAMPLE]

"However, as long ago as 1975..."

God, that makes me feel old.