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Hoag's object
November 19, 2015 at 4:32 pm
https://en.m.wikipedia.org/wiki/Hoag%27s_Object.
Check out the beautiful ring galaxy Hoag's object. One thing has always bothered me - the other presumed more distant ring galaxy seen through the "eye of the needle". What are the chances of that happening ?!! To me it looks more like something orbiting the central mass and gathering up the material between that and the outer ring.
On the other hand coincidences do happen.
Grimesy
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RE: Hoag's object
November 19, 2015 at 4:37 pm
(This post was last modified: November 19, 2015 at 4:37 pm by TheRealJoeFish.)
I'm guessing:
Chances of this happening any place are very small.
Chance of this happening some place is very large.
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RE: Hoag's object
November 19, 2015 at 4:47 pm
(November 19, 2015 at 4:32 pm)pgrimes15 Wrote: https://en.m.wikipedia.org/wiki/Hoag%27s_Object.
Check out the beautiful ring galaxy Hoag's object. One thing has always bothered me - the other presumed more distant ring galaxy seen through the "eye of the needle". What are the chances of that happening ?!! To me it looks more like something orbiting the central mass and gathering up the material between that and the outer ring.
On the other hand coincidences do happen.
Grimesy
Huh. Never seen that before. Thanks for the potential new avatar candidate 
Though in regards to the galaxy viewed through through the gap...it's much redder in colour, which suggests to me that calculating its redshift played a part in identifying it as a more distant object.
![[Image: rySLj1k.png]](https://images.weserv.nl/?url=i.imgur.com%2FrySLj1k.png)
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RE: Hoag's object
November 19, 2015 at 5:01 pm
Makes me fantasize about what it looks like to be there... Awesome
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RE: Hoag's object
November 19, 2015 at 5:04 pm
Where's Oro? We need our astronomer!
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RE: Hoag's object
November 19, 2015 at 5:12 pm
Hehe. Looks pretty good there, I think :3
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RE: Hoag's object
November 19, 2015 at 5:14 pm
(November 19, 2015 at 4:37 pm)TheRealJoeFish Wrote: I'm guessing:
Chances of this happening any place are very small.
Chance of this happening some place is very large.
Yes absolutely agree with that. But now the idea of an orbiting object has occurred to me, that's what it looks like every time I look at it. I would love to see some convincing science that demonstrates that it is distant, to get this pesky notion out of my head - I can't unthink it !
Grimesy
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RE: Hoag's object
November 19, 2015 at 5:19 pm
(November 19, 2015 at 4:47 pm)Kaiser Wrote: (November 19, 2015 at 4:32 pm)pgrimes15 Wrote: https://en.m.wikipedia.org/wiki/Hoag%27s_Object.
Check out the beautiful ring galaxy Hoag's object. One thing has always bothered me - the other presumed more distant ring galaxy seen through the "eye of the needle". What are the chances of that happening ?!! To me it looks more like something orbiting the central mass and gathering up the material between that and the outer ring.
On the other hand coincidences do happen.
Grimesy
Huh. Never seen that before. Thanks for the potential new avatar candidate
Though in regards to the galaxy viewed through through the gap...it's much redder in colour, which suggests to me that calculating its redshift played a part in identifying it as a more distant object.
Yes I noticed the redder colour and I think you're probably right, but every article about Hoag's object I have found concentrates on the galaxy itself and only mentions the other object in passing as a "presumed" more distant galaxy.
Grimesy
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RE: Hoag's object
November 19, 2015 at 5:59 pm
(This post was last modified: November 19, 2015 at 6:09 pm by mediocrates.)
This site mentions that the ring and core were determined to have the same velocity/redshift and that the gap is not empty. Also, if the similar looking background object was the same distance as hoag's it would be enormous compared to the stars, so it would have to be a tiny (relatively) galaxy made of stellar sized objects. Hoag's gravity would rip it apart.
http://heritage.stsci.edu/2002/21/lucas_...lucas.html
Quote:The key facts from Schweizer's study are that there is luminous material in the apparent gap between the nucleus and the ring, that the core or nucleus is a normal spheroidal galaxy with a normal radial light profile for its type (a so-called r^1/4 profile), that the nucleus and ring have essentially the same recessional velocity or redshift and are therefore physically associated,
I have noticed that there is very little information about the background object and the probability of such an alignment. Hoag's is a fascinating object...
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RE: Hoag's object
November 19, 2015 at 6:27 pm
(November 19, 2015 at 4:37 pm)TheRealJoeFish Wrote: I'm guessing:
Chances of this happening any place are very small.
Chance of this happening some place is very large.
Or, put another way, the odds of this happening are exactly 1:1.
Boru
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