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Deep impact?
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 Re: Deep impact?
Posted by Fjorn on Wed Jul 6th at 9:55am 2005

Chrono is basically correct, even if he got the names wrong

Red Giant, not Dwarf :P

? quoting Some Science Site
In about 5 billion years, the hydrogen in the center of the Sun will start to run out. The helium will get squeezed. This will speed up the hydrogen burning. Our star will slowly puff into a red giant. It will eat all of the inner planets, even the Earth.

As the helium gets squeezed, it will soon get hot enough to burn into carbon. At the same time, the carbon can also join helium to form oxygen. The Sun is not very big compared to some stars. It will never get hot enough in the center to burn carbon and oxygen. These elements will collect in the center of the star. Later it will shed most of its outer layers, creating a planetary nebula, and reveal a hot white dwarf star.

Nearly 99 percent of all stars in the galaxy will end their lives as white dwarfs. By studying the stars that have already changed, we can learn about the fate of our own Sun.


Eventually The White dwarf will burn out and it will become a black dwarf.



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 Re: Deep impact?
Posted by pepper on Wed Jul 6th at 10:28am 2005

Does the gravity stops excisting then? Or does that continue to be at the spot of the black dwarf.



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 Re: Deep impact?
Posted by Orpheus on Wed Jul 6th at 1:02pm 2005

? quoting DrGlass

I think if we flogged more people for doing dumb things, there would be alot more floggins.

So, flogging someone "promotes" dumb actions?

You'd think it would work the other way around. :/





The best things in life, aren't things.



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 Re: Deep impact?
Posted by wil5on on Wed Jul 6th at 1:03pm 2005

Gravity is proportional to mass, as the sun dies it sheds most of its helium/hydrogen, and hence loses mass. Dwarf stars are high-density (if memory serves) but not as high as say a neutron star, or a black hole. In short, there is still gravity, but not as much as before the sun died.


"If you talk at all during this lesson, you have detention. Do you understand?"
- My yr11 Economics teacher



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 Re: Deep impact?
Posted by Dark_Kilauea on Wed Jul 6th at 5:32pm 2005

oh, btw, you can see black holes, in fact, they emit several kinds of light...

Until later...



Dark_Kilauea
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http://www.dvstudio-production.com/



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 Re: Deep impact?
Posted by Orpheus on Wed Jul 6th at 5:50pm 2005

? quoting Dark_Kilauea
oh, btw, you can see black holes, in fact, they emit several kinds of light...

Until later...

I hesitate commenting in this thread cause I deservedly have a reputation for being functionally stupid.. But.

I know quite a bit about this topic (gleaned from several dozen books on the subject, not from school courses) and must resist the urge to post because it would lead to a pages long discussion. However, you cannot see black holes. You can see the distortion edge caused by the event horizon, but the hole itself is exactly that.. BLACK, hence.. Invisible.

As I said, I do know quite a bit but... I just know that someone with more schooling would attempt to disprove that so I will avoid further commenting.

I just couldn't ignore the seeing comment.





The best things in life, aren't things.



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 Re: Deep impact?
Posted by Dark_Kilauea on Wed Jul 6th at 6:07pm 2005

Acuatly, I was reading an article (can remember where it is) that said that scientists can detect black holes from the xrays that come out of them. Also, in Scientific American, there was an article on how black holes may not distroy the matter that comes into them, they just convert it. Anyway, I agree with Orph, I really don't feel like reading a several pages long discussion about something that is slightly off topic.

*Goes up to top and refreshes memory about what the topic is about*

Ah, yes, nasa shooting comets...

Until Later...



Dark_Kilauea
DVS Administration
http://www.dvstudio-production.com/



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 Re: Deep impact?
Posted by Fjorn on Wed Jul 6th at 7:17pm 2005

Actually the X-rays are emitted from the accretion disc as is "screams" before it is consumed by the black hole


If I wasn't bone tired, I'd look up specifics



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 Re: Deep impact?
Posted by wil5on on Thu Jul 7th at 12:21am 2005

From what I know about the x-ray emission, its emitted whenever matter enters the hole. Which I think implies mass->energy conversion, which is matter annihilation. Its impossible to "destroy" matter, but you can convert it to energy, and you can convert energy to matter.


"If you talk at all during this lesson, you have detention. Do you understand?"
- My yr11 Economics teacher



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 Re: Deep impact?
Posted by omegaslayer on Thu Jul 7th at 12:22am 2005

? quote:
? quoting Dark_Kilauea
oh, btw, you can see black holes, in fact, they emit several kinds of light...

Until later...

I hesitate commenting in this thread cause I deservedly have a reputation for being functionally stupid.. But.

I know quite a bit about this topic (gleaned from several dozen books on the subject, not from school courses) and must resist the urge to post because it would lead to a pages long discussion. However, you cannot see black holes. You can see the distortion edge caused by the event horizon, but the hole itself is exactly that.. BLACK, hence.. Invisible.

As I said, I do know quite a bit but... I just know that someone with more schooling would attempt to disprove that so I will avoid further commenting.

I just couldn't ignore the seeing comment.


Why not create another thread then? To me its been along time since any actual scientific/"enlightenment" threads have been posted in the general board.
Who knows though, maybe thats just asking for trouble to have a discussion on black holes and the Creation of the Universe.
*hears the angry masses warming up already
*runs



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 Re: Deep impact?
Posted by Myrk- on Thu Jul 7th at 12:30am 2005

Whats going on? I haven't heard about this?!


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 Re: Deep impact?
Posted by Orpheus on Thu Jul 7th at 12:32am 2005

The problem with intellectual threads is the majority of our most learned members tend to avoid them.. Thats not to say they are rude or snobbish but the opinions I really want to hear are from members whom either no longer post, or are MIA now..

I do not see however how black holes and creationism can be compared or even intermingled within a same topic without the thread going seriously astray.

My concerns about commenting are not that I will be told I am wrong. Lord knows I am told that all to often already. My concern is that even though I do know a lot about the topic, I will not be able to convey it in such a manner that will sound credible...

Astronomy was a passion of mine once upon a time. I know damned little after 1980, but prior?? thats another story.. Problem is, current knowledge may now disprove some of my old news.

Another passion of mine was Paleontology and its related subjects.. So the planet killer comets is among that as well.

*shrugs*

Either way, I am off tomorrow for Connecticut.. So I will not be in any topics soon.





The best things in life, aren't things.



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 Re: Deep impact?
Posted by rival on Sat Jul 9th at 12:21am 2005

? quoting satchmo
The projectile that was shot towards the comet has the mass ratio comparable to that of a fly hitting a commercial passenger jet.

Unless you think the fly can knock off a plane from the sky, you shouldn't worry about the comet being affected by the impact.

if the passenger jet was in space and the fly was traveliing at serval thousands of miles per hour it could either cause a slight change in trajectory (that over the distance a comet flies would acutally be a big change) or cause a considerable hole in the plane. ever hear about that fleck of dust that caused a worryingly sized crater in a space shuttle cause it was going so fast?

if a large comet or asteroid hit the water all of the coast almost everywehre would be annhilated. if it hit the land it would kick up a worldwide dust cloud that would effectively block out the sun and last for many many years.

according to one of einsteins lesser known assumpitions black holes are acutally holes in time and space. he saiid that large objects such as the sun or a planet distort space so creating gravity. a black hole is formed when the gravity becomes so intense it effectively breaks through the plane of reality leaving a hole

i realy think this should become a scientific discussion we need more of them around here






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