Starship Asterisk*

Thanks for that neufer. It sure does explain why stars blow up. But i still wonder why it takes them so long :?:

[float=right][img]http://pravasiduniya.com/wp-content/uploads/2011/01/china-flag1-225x149.png[/img][/float][quote="APOD Robot"][url=http://apod.nasa.gov/apod/ap120118.html][img]http://apod.nasa.gov/apod/calendar/S_120118.jpg[/img] [size=150]Cygnus X: The Inner Workings of a Nearby Star Factory[/size][/url][/quote]
[list]. http://www.thedailyshow.com/watch/mon-january-16-2012/fear-factory[/list]

[quote="biddie67"]This kind of apparently straight-forward cause and effect relationship bothers me.

Some time back, in a previous APOD, I had asked a question about the relationship between gravity and the fabric/network of spacetime. Chris had suggested that gravity is the result of the spacetime network being impacted. (At least, I think that is what he suggested.) What would impact the spacetime network to start with to result in the gravity to cause dust to gather?[/quote]
It's a positive feedback situation. Matter with mass creates gravity, and then that gravity attracts more matter, which increases the gravity, and so forth.

[quote]Sorry I do struggle with this .... and doesn't static electricity play a part in dust coalescing?[/quote]
Almost certainly, under the right conditions. But only at certain scales- Electrical effects are probably insignificant for anything larger than dust, which is likely to be electrically neutral. Effects due to surface charge tend to require a lot of surface area compared with volume- i.e. tiny particles.

The important point is that- theoretically at least- you don't need any forces except gravity to bring together particles- even if other forces may catalyze or speed up the process in practice.

[quote="Shazbot"][quote="saturn2"] ....... What energy is forming stars?[/quote]

Gravity[/quote]

This kind of apparently straight-forward cause and effect relationship bothers me.

Some time back, in a previous APOD, I had asked a question about the relationship between gravity and the fabric/network of spacetime. Chris had suggested that gravity is the result of the spacetime network being impacted. (At least, I think that is what he suggested.) What would impact the spacetime network to start with to result in the gravity to cause dust to gather?

Sorry I do struggle with this .... and doesn't static electricity play a part in dust coalescing?

[quote="saturn2"]The star factory Cygnus X is 4,500 light-years.
Is a star factory, of the many stars,
This is very important in tha study of the galaxies.
But, how the H and dust form the stars ? What energy is forming stars?[/quote]

Gravity

[quote="Byork"]can a image of the same region be supplies in optical light..? mine eyes do not operate in th infra red[/quote]



It may look something [url=http://www.cfa.harvard.edu/cygnusX/surveyfieldMMT.jpg]like this[/url], in a fairly large telescope..... (But mine isn't fairly large, and this is just what I found searching online. So if anyone has anything more accurate, feel free to post!)


:mrgreen:

[quote="Byork"]can a image of the same region be supplies in optical light..? mine eyes do not operate in th infra red[/quote]
WorldWide Telescope does that easily.

can a image of the same region be supplies in optical light..? mine eyes do not operate in th infra red

[quote="saturn2"]The star factory Cygnus X is 4,500 light-years.
Is a star factory, of the many stars,
This is very important in tha study of the galaxies.
But, how the H and dust form the stars ? What energy is forming stars?[/quote]
It would be nice to watch some virtual videos of star formation! :)

[quote="Beyond"]I especially like the Milky Way Galaxy link. I do belive that the central black hole can be seen in the middle of the water fountain. And i wonder if that's an alcoholic beverage that caused the great calm in the calm link?[/quote]
You mean this guy! I think he's cute! :wink: 8-)
[img2]http://eatgoodlivegoodfeelgood.files.wordpress.com/2012/01/relaxed.jpg[/img2]

I agree this is most impressive. With the reds and greens it would have make a great Christmas day picture. Are the clumps of lighter arrears of actual star formation?

The star factory Cygnus X is 4,500 light-years.
Is a star factory, of the many stars,
This is very important in tha study of the galaxies.
But, how the H and dust form the stars ? What energy is forming stars?

This is certainly a most impressive image. I can easily imagine that it is a treasure trove for professional astronomers.

For me, however, the image is beautiful, yet confusing. The picture tells me no story. Yes, I can understand that it shows me the presence of a lot of dust. Yes, I can understand that the dust has different temperatures and structures. But what do those temperatures and structures mean?

Yes, I can understand that redder gas is colder and greener gas is warmer. Yes, I can understand that cool - make that cold - dust is good for making stars. And yes, I can understand that dust that is warmer has probably already been affected by the heat and radiation of of hot stars.

But I can't see where in this image stars are being born. More frustratingly for me, I can think of no way to judge how massive the stars are that are being born.
[float=right][img]http://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Papyrus_Ani_curs_hiero.jpg/200px-Papyrus_Ani_curs_hiero.jpg[/img][/float]

For me it's like trying to read a very foreign language. The letters are beautiful but incomprehensible.


I probably shouldn't complain, because that's the way it is for very many people looking at astronomical pictures, I'm sure. The pictures are beautiful, but ultimately mysterious.



Ann

[b][i] http://asterisk.apod.com/viewtopic.php?f=31&t=26442 [/i][/b]

I especially like the Milky Way Galaxy link. I do belive that the central black hole can be seen in the middle of the water fountain. And i wonder if that's an alcoholic beverage that caused the great calm in the calm link?

[url=http://apod.nasa.gov/apod/ap120118.html][img]http://apod.nasa.gov/apod/calendar/S_120118.jpg[/img] [size=150]Cygnus X: The Inner Workings of a Nearby Star Factory[/size][/url]

[b] Explanation: [/b] How do stars form? To help study this complex issue, astronomers took a deep [url=http://missionscience.nasa.gov/ems/07_infraredwaves.html]infrared[/url] image of [url=http://www.cfa.harvard.edu/cygnusX/abst.html]Cygnus X[/url], the largest known star forming region in the entire [url=http://apod.nasa.gov/apod/ap110118.html]Milky Way Galaxy[/url]. The [url=http://www.spitzer.caltech.edu/images/4868-ssc2012-02a-Stars-Brewing-in-Cygnus-X]above recently-released image[/url] was taken in 2009 by the orbiting [url=http://www.spitzer.caltech.edu/mission/32-The-Mission]Spitzer Space Telescope[/url] and digitally translated into [url=http://www.colorpicker.com/]colors[/url] humans can see, with the hottest regions colored the most blue. [url=http://www.cfa.harvard.edu/cygnusX/2012_AustinAASposter.pdf]Visible[/url] are large bubbles of hot gas inflated by the [url=http://apod.nasa.gov/apod/ap000318.html]winds[/url] of massive stars soon after they form. Current models posit that these expanding [url=http://apod.nasa.gov/apod/ap070714.html]bubble[/url]s sweep up gas and sometimes even collide, frequently creating regions dense enough to gravitationally collapse into yet more stars. The star factory [url=http://www.nasa.gov/mission_pages/spitzer/multimedia/pia15253.html]Cygnus-X[/url] spans over 600 light years, contains over a million times the mass of our Sun, and [url=http://www.cfa.harvard.edu/cygnusX/DIRBE_140um.jpg]shines prominently[/url] on wide angle [url=http://apod.nasa.gov/apod/ap000517.html]infrared panoramas[/url] of the night sky. [url=http://www.cfa.harvard.edu/cygnusX/whatis.html]Cygnus X[/url] lies 4,500 light years away towards the [url=http://en.wikipedia.org/wiki/Cygnus_%28constellation%29]constellation of the Swan[/url] (Cygnus). In a few million years, [url=http://eatgoodlivegoodfeelgood.files.wordpress.com/2012/01/relaxed.jpg]calm[/url] will likely be restored and a large [url=http://asterisk.apod.com/viewtopic.php?f=24&t=18009]open cluster[/url] of stars will remain -- which itself will disperse over the next 100 million years.

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