[IceyJones]

 

[Admiral_Stones]

There0s no fridge ?!

[Wobble73]

My wife would say that this is me!!!   

[Mika]

Just something related to topic:

http://www.spectrum.ieee.org/mar08/6051

This sounds a little strange for me, at least. I would suspect another mechanism here causing the black hole effect than explained in the article - I would go so far and say calling that analogical to black hole is a misnomer. But, lets see when they have published something about it. It might be so that what was written was not an accurate description of events happening there.

Regarding sun spots, I'm actually after the reason for the 11 year cycle... didn't find that from the web page.

The sun is speculated to have formed from the remnanments of an explosion of some hypernova. Saying that we cannot detect the original star that blew up since it is a singularity and cannot thus be detected is handwaving at best, if you ask me. Why? The hypothesis cannot be tested by default. And according to my understanding of Physics, that original blown up star should be quite close to us in the astronomical terms. But teaching the birth of solar system as an absolute truth in the college (it is much more absolute in those books IIRC) is a little bit off.

Mika

[chief1983]

Heh, I was just subscribed to Spectrum until this last week when my IEEE registration expired.

[Janos]

Short of totally cracking the military networks it is hard to say what they are hiding.

the milkman conspiracy

[General Battuta]

This sounds a little strange for me, at least. I would suspect another mechanism here causing the black hole effect than explained in the article - I would go so far and say calling that analogical to black hole is a misnomer.

It's got an event horizon that traps light. That's all they claim it does. Isn't that a pretty decent analogy?

The sun is speculated to have formed from the remnanments of an explosion of some hypernova. Saying that we cannot detect the original star that blew up since it is a singularity and cannot thus be detected is handwaving at best

Wait, who says that? That it's a singularity and can't be detected? I would think we can't detect because it blew up a while back, thereby allowing the Sun to form. No singularity required, right?

[Mika]

Wait, who says that? That it's a singularity and can't be detected? I would think we can't detect because it blew up a while back, thereby allowing the Sun to form. No singularity required, right?

This is from IceyJones:

easy to answer:
the star-remnants we are formed of were the product of so called hypernovas as the first and second-generation stars were HUGE! only few of them form also today (factor 100 times the sun and bigger). the remnant of such a star is -as far as we know- a stellar singularity. these we are not able to detect directly so far. thats all.....

Also, what is the measurement result that tells us those stars were actually larger?

It's got an event horizon that traps light. That's all they claim it does. Isn't that a pretty decent analogy?

Without seeing the paper I cannot really say anything about it. Depends on from your point of view. For starters, would you call a well polished diamond analogous to a black hole?

Mika

[neo_hermes]

i knew that when i started this thread my eye's would bleed...i was right..

[General Battuta]

What IceyJones was saying is that the remnant of these supermassive stars exploding is a black hole. Thus we can't directly detect it. Indirect detection of black holes is quite possible. The model that states that our sun is made from the remnants of past stellar detonations is quite solid and has withstood a lot of tests.

I don't believe a well-polished diamond is analogous because you can see it. It doesn't have an event horizon.

[IceyJones]

right.....our star must be a second or even third generation star because of its high metal content, as the first stars were made of hydrogen and only very little helium...the metals in our sun MUST be the product of the first stars exploding somewhere out there.....

it is also fact that newer stars formed out there have always a little bit more metals inside than older ones......so heavier materials than helium are generated in the stars and are contaminating the surrounding area.....its some kind of recyling out there......

each generation has more metal inside.....(and remember.....ALL meterails more havy than helium are metals in the wording of space science).....