APOD: Globular Cluster M15 from Hubble (2011 May 03)
- Ailean4321
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Dear Chris & Cabellasus,
What are your occupations? I'm curious. & Intrigued.
What are your occupations? I'm curious. & Intrigued.
- Ailean4321
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Harry SevenEagles wrote:Fantastical !
prettttyyyy
![Very Happy :D](./images/smilies/icon_biggrin.gif)
- Chris Peterson
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
I'm an astrophysicist, currently working in the area of meteor analysis. As an astronomer, I live on the border between amateur and professional astronomy, as my interests and work overlap both.Ailean4321 wrote:Dear Chris & Cabellasus,
What are your occupations? I'm curious. & Intrigued.
Chris
*****************************************
Chris L Peterson
Cloudbait Observatory
https://www.cloudbait.com
*****************************************
Chris L Peterson
Cloudbait Observatory
https://www.cloudbait.com
- Ailean4321
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Amazing, you have fulfilled two of my future aspirations:
Astronomer/physicist & Colorado.
Although, I don't know that my brain is cut out for the former.
Astronomer/physicist & Colorado.
Although, I don't know that my brain is cut out for the former.
"Oh how I wish I could shut up like a telescope! I think I could, if I only knew how to begin." -Alice
- Ailean4321
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Very much appreciate the videos.NoelC wrote:For the visually-oriented among us, some fun links. I couldn't find any done really, really well in HD though... Sounds like it could be a fun simulation project for someone.
-Noel
"Oh how I wish I could shut up like a telescope! I think I could, if I only knew how to begin." -Alice
Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
BMAONE and Noel, thanks for your links!
Ann
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Ann
Color Commentator
Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Meteormaid@gmail.comShould be called "Queen Anne's Lace" cluster.
- geckzilla
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Sure it is, just start watching the astronomy 101 videos.Ailean4321 wrote:Amazing, you have fulfilled two of my future aspirations:
Astronomer/physicist & Colorado.
Although, I don't know that my brain is cut out for the former.
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)
Just call me "geck" because "zilla" is like a last name.
Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
If other forms of galaxy structures all have a black hole, rotate & are effected by gravity, and a globular galaxy is supposed to have a black hole, does not rotate and is effected by gravity, why the difference? Are the stars moving in towards the centre or moving away? One can speculate as to why, but it would be nice for someone to say sometime we don't now!
- Chris Peterson
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Re: APOD: Globular Cluster M15 from Hubble (2011 May 03)
Not all galaxies have central black holes, and not all globular clusters have central black holes. In those that do, the black holes generally have very little gravitational impact on the whole structure. In fact, galaxies and globular clusters behave very similarly. Neither rotate, but both contain large numbers of stars which orbit the center of mass. When galaxies are disc-like, they appear to rotate, because many of their member stars have their angular momentum vectors pointing in a similar direction. But even in flat spirals, the majority of stars are usually found in central bulges that approach being spherical, and those stars orbit at nearly random inclinations. And the overall motion of stars is probably very similar in globular clusters and elliptical galaxies. In them, there is little net movement of stars inwards or outwards. Stars are in orbits of various inclinations and eccentricities, and are individually subject to extensive perturbations due to close encounters with other stars.garry wrote:If other forms of galaxy structures all have a black hole, rotate & are effected by gravity, and a globular galaxy is supposed to have a black hole, does not rotate and is effected by gravity, why the difference? Are the stars moving in towards the centre or moving away? One can speculate as to why, but it would be nice for someone to say sometime we don't now!
Chris
*****************************************
Chris L Peterson
Cloudbait Observatory
https://www.cloudbait.com
*****************************************
Chris L Peterson
Cloudbait Observatory
https://www.cloudbait.com