Stellaris D-28: The Puzzle

Stellaris D-28: The Puzzle

  • Hello Everyone, Today we've upgraded to the latest version of our forum software, bringing more features and better performance to the community. As always, we appreciate your bug reports and feedback, and you can post all of that here, as well as view the list of new features
  • Crusader Kings III Available Now!

    The realm rejoices as Paradox Interactive announces the launch of Crusader Kings III, the latest entry in the publisher’s grand strategy role-playing game franchise. Advisors may now jockey for positions of influence and adversaries should save their schemes for another day, because on this day Crusader Kings III can be purchased on Steam, the Paradox Store, and other major online retailers.


    Real Strategy Requires Cunning

This thread is more than 5 months old.

It is very likely that it does not need any further discussion and thus bumping it serves no purpose. If you feel it is necessary to make a new reply, you can still do so though.

Mar 18, 2016
1.725
7.164
We're back! Good morning and welcome to Stellaris Day -28! Today we're going to talk about straight-up nonsense which cannot possibly exist and which violates everything we know about galaxies.

Please meet Hoag's Object.

(Image used courtesy of Cornell.)

I'm not saying that it was definitely formed by witches. As a scientist I can't say that, since we haven't observed clear evidence of their activity and since other possibilities exist. (Necromancers, for example.) However, my suspicion is that it was witches.

If you're not an astrophysicist, you may not understand why I am freaking out this badly over this galaxy. Let me explain.

Most galaxies are either elliptical or spiral (or lenticular, but they aren't important here.) Elliptical galaxies don't have much dust or gas in their halo, and are composed of mostly old stars blobbed together without much structure. Spiral galaxies have large amounts of dust and gas which leads to many new, young stars. They have beautiful and elegant "arm" structures which reach out from the core.

Hoag's Object has a bright yellow core which is composed of older stars, like an elliptical galaxy. However it also has a ring of young stars surrounded by a huge disc of gas, like a spiral galaxy.

So is it a combination of the two? No. The older core is almost perfectly spherical, which is basically unknown in elliptical galaxies; and the outside is ring-shaped instead of arm-shaped, which... look at it! Just look at it! That doesn't happen by accident. Something is up here.

Witch-hysteria aside, how could it have formed?

Ring-shaped galaxies aren't entirely unknown. (If you look hard at the picture you can actually see another of them through the gap in Hoag's Object; it appears red in that picture.) In most cases they occur because of collisions between galaxies. If a smaller galaxy acted like a "bullet" and plowed into the middle of a spiral galaxy at high speed, it would push the stars outwards in a huge but very slow wave, and leave only an outer ring separated from what's left of the core.

We don't think this is what happened with Hoag's Object. For one thing, the core stars of Hoag's Object are much older than the stars in the ring. For another thing, the cores of spiral galaxies aren't perfectly spherical like Hoag's Object's core is.

There's also the small matter that we can't spot anything that could have been the "bullet." Tracking the motion of galaxies through space isn't that hard - they're not small and they tend to move in steady directions - but there's nothing we can find. It couldn't just have disappeared.

Arthur Hoag, its discoverer and namesake, suggested that Hoag's Object was actually an optical illusion caused by the "gravitational lensing" of a massive black hole. This was plausible when he suggested it in 1950 and would be a neat solution but we've since confirmed that it isn't the case.

Noah Brosch suggested another method: it could have been a bar galaxy (a type of spiral galaxy that's growing more common as the galaxy ages) which had its centre fall apart and had the spirals drift outwards into a ring. However, this would also result in a disc-shaped core rather than the spherical core we see here, and even Brosch has admitted that this is unlikely given what we know of bar galaxies.

Ultimately we just don't know.

Don't leave me in suspense here! Was it witches, or indeed something less silly like aliens?

I'm not saying that it was witches. I'm also not saying that it wasn't. All I'm saying is, keep a bucket of water handy if you go there.

All silliness aside, Hoag's Object leaves us with exactly two possibilities: We either know a lot less about galaxy formation than we thought we did, or there's something out there which can shift stars around in ways we couldn't even dream of. Neither is a nice thought.

Previous Thread: Star Types
Next Thread: The Twins, Part One
 
Last edited:
  • 58
  • 16
Reactions:

TheNitram

Second Lieutenant
16 Badges
Mar 30, 2016
121
426
  • Magicka
  • Pillars of Eternity
  • Stellaris
  • Stellaris: Galaxy Edition
  • Stellaris: Galaxy Edition
  • Stellaris Sign-up
  • Tyranny: Archon Edition
  • Stellaris: Leviathans Story Pack
  • Stellaris - Path to Destruction bundle
  • Stellaris: Synthetic Dawn
  • Stellaris: Apocalypse
  • Stellaris: Distant Stars
  • Stellaris: Megacorp
  • Stellaris: Ancient Relics
  • Age of Wonders: Planetfall
  • Stellaris: Lithoids
I love learning about stuff we don't understand. Thank you again for doing this, space donuts are great!
 
  • 4
Reactions:

mrinku

Lt. General
25 Badges
Jul 29, 2015
1.482
780
  • Crusader Kings II: Charlemagne
  • Crusader Kings II
  • Sengoku
  • Crusader Kings II: Sword of Islam
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: The Republic
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings III: Royal Edition
  • Crusader Kings III
  • Crusader Kings II: Holy Fury
  • Age of Wonders III
  • Surviving Mars
  • Crusader Kings Complete
  • Crusader Kings II: Monks and Mystics
  • Stellaris: Leviathans Story Pack
  • Crusader Kings II: Reapers Due
  • Stellaris Sign-up
  • Stellaris
  • Crusader Kings II: Conclave
  • Crusader Kings II: Horse Lords
  • Crusader Kings II: Way of Life
  • Cities: Skylines
Bravo! Thanks for showing us that!
 

hjarg

Insert witty title here
99 Badges
Dec 23, 2000
5.797
846
  • Rome: Vae Victis
  • Hearts of Iron III Collection
  • Heir to the Throne
  • Europa Universalis III Complete
  • Europa Universalis III Complete
  • Victoria: Revolutions
  • Europa Universalis: Rome
  • Rome Gold
  • Semper Fi
  • Victoria 2: A House Divided
  • Victoria 2: Heart of Darkness
  • Europa Universalis IV: Res Publica
  • Crusader Kings II: Reapers Due
  • Stellaris: Synthetic Dawn
  • Europa Universalis IV: Pre-order
  • Tyranny: Gold Edition
  • Cities: Skylines - After Dark
  • Europa Universalis IV: Cossacks
  • Cities: Skylines - Snowfall
  • Europa Universalis IV: Mare Nostrum
  • Stellaris
  • Crusader Kings II: Sons of Abraham
  • Hearts of Iron II: Armageddon
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Hearts of Iron III: Their Finest Hour
  • Crusader Kings II: Sword of Islam
  • Deus Vult
  • Europa Universalis III: Chronicles
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Call to arms event
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Art of War
  • Divine Wind
  • Europa Universalis III
  • Europa Universalis IV: El Dorado
  • Europa Universalis: Rome Collectors Edition
  • Crusader Kings II: Way of Life
  • Pillars of Eternity
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Horse Lords
  • Crusader Kings II: Conclave
  • Victoria 2
Well, i smell a Nobel or two coming to the fellow who solves the mystery.
But it is kind of sad- there is a whole universe full of mysteries and here i am, stuck on this planet :S
 
  • 2
Reactions:

Khelder

First Lieutenant
94 Badges
Mar 9, 2012
250
239
  • Crusader Kings II
  • Stellaris - Path to Destruction bundle
  • Crusader Kings II: Reapers Due
  • Crusader Kings II: Jade Dragon
  • Europa Universalis IV: Mare Nostrum
  • Rome: Vae Victis
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Semper Fi
  • Knights of Honor
  • Victoria: Revolutions
  • Europa Universalis IV: Res Publica
  • Tyranny - Tales from the Tiers
  • Knights of Pen and Paper +1 Edition
  • Hearts of Iron III Collection
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Europa Universalis IV: Third Rome
  • Crusader Kings II: Sword of Islam
  • Darkest Hour
  • Europa Universalis III: Chronicles
  • Europa Universalis IV: Art of War
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Wealth of Nations
  • For the Motherland
  • Hearts of Iron IV Sign-up
  • Stellaris Sign-up
  • Hearts of Iron IV: Cadet
  • Hearts of Iron IV: Colonel
  • Europa Universalis IV: Rights of Man
  • Tyranny: Archon Edition
  • Stellaris: Leviathans Story Pack
  • Hearts of Iron IV: Together for Victory
  • Crusader Kings II: Monks and Mystics
  • Europa Universalis IV: Mandate of Heaven
  • Stellaris
  • Crusader Kings II: Conclave
  • Europa Universalis IV: Cossacks
  • Europa Universalis 4: Emperor
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: El Dorado
  • 500k Club
  • BATTLETECH
I am not astrophysicist, but could it be that the centre stars gravitational pull would have over time made tha stars close to it to an spiral orbit closing the center star with every cycle thus increasing the mass in the centre and possibly even the centre star by collapsing stars to it when stars get too close in their orbit. Increasing center mass would in turn increase gravitational pull leading to a cycle in which the stars further and further from the center would be affected and be derailed to an spiral orbit towrds the center. Still the gravitational pull wouldn´t be enoug to collapse the hole galaxy at once.

We can see some spiral shapes in the ring which could be the remnants of the galagtic arms and there are some stars in the void ring between the center and tha ring that could be stars sliding towards the central mass.

ofcourse as I said I am not astrophysicist and might not have considered all things that could be affecting this thing, but that is just my hypothesis of what might be behind the anomaly.
 

prismaticmarcus

Field Marshal
66 Badges
Sep 28, 2014
2.787
2.474
  • Age of Wonders III
  • Crusader Kings III: Royal Edition
  • Europa Universalis 4: Emperor
  • Empire of Sin
  • Europa Universalis IV: Pre-order
  • Cities: Skylines - After Dark
  • Europa Universalis IV: Cossacks
  • Europa Universalis IV: Mare Nostrum
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Mandate of Heaven
  • Hearts of Iron IV: Cadet
  • Europa Universalis IV: Rights of Man
  • Stellaris: Digital Anniversary Edition
  • Stellaris: Leviathans Story Pack
  • Cities: Skylines - Natural Disasters
  • Crusader Kings III
  • Hearts of Iron IV: Together for Victory
  • Crusader Kings II: Monks and Mystics
  • Cities: Skylines - Mass Transit
  • Stellaris: Lithoids
  • Crusader Kings II: Holy Fury
  • Stellaris: Ancient Relics
  • Cities: Skylines - Green Cities
  • Stellaris: Humanoids Species Pack
  • Stellaris: Apocalypse
  • Europa Universalis IV: Rule Britannia
  • Cities: Skylines - Parklife Pre-Order
  • Cities: Skylines - Parklife
  • Europa Universalis IV: Golden Century
  • Stellaris: Distant Stars
  • Europa Universalis IV: Dharma
  • Stellaris: Megacorp
  • Stellaris Sign-up
  • Stellaris: Galaxy Edition
  • Stellaris
  • Crusader Kings II: Conclave
  • Crusader Kings II: Horse Lords
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: El Dorado
  • Teleglitch: Die More Edition
  • Europa Universalis IV: Third Rome
  • Cities in Motion 2
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
is it possible that the sphere was gravitationally captured by the ring? or vice versa?
 

NaniteKingdom

Private
34 Badges
Mar 8, 2016
12
73
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Mare Nostrum
  • Crusader Kings II: Reapers Due
  • Crusader Kings II
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Art of War
  • Crusader Kings II: Sword of Islam
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: The Republic
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: Charlemagne
  • Stellaris: Apocalypse
  • Stellaris: Humanoids Species Pack
  • Stellaris: Synthetic Dawn
  • Stellaris: Leviathans Story Pack
  • Europa Universalis IV: Rights of Man
  • Stellaris Sign-up
  • Stellaris: Galaxy Edition
  • Stellaris
  • Crusader Kings II: Conclave
  • Europa Universalis IV: Cossacks
  • Europa Universalis IV: Common Sense
  • Pillars of Eternity
  • Crusader Kings II: Way of Life
  • Cities: Skylines
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Victoria 2
  • Victoria: Revolutions
  • Stellaris: Galaxy Edition
Hey BeautifulVoid,
I've seen your series for the first time today, and I wanna give you a massive thank you! It's a really interesting read and fuel for my imagination. Went back to Crab nebula so far.. oh boy there is just so much out there, too bad we're all born too early before we somehow manage to overcome physics and just fly around there. Space tourism for the win ;-)
 
  • 1
Reactions:

Wyrm

General
31 Badges
Dec 7, 2003
1.801
1.482
  • Surviving Mars
  • BATTLETECH: Heavy Metal
  • BATTLETECH: Season pass
  • Hearts of Iron IV: Expansion Pass
  • Stellaris: Megacorp
  • BATTLETECH: Flashpoint
  • Stellaris: Distant Stars
  • Hearts of Iron IV: Expansion Pass
  • Cities: Skylines - Parklife
  • Cities: Skylines - Parklife Pre-Order
  • Stellaris: Apocalypse
  • Stellaris: Humanoids Species Pack
  • Hearts of Iron IV: Expansion Pass
  • Age of Wonders III
  • Stellaris: Synthetic Dawn
  • Hearts of Iron IV: Death or Dishonor
  • Hearts of Iron III
  • BATTLETECH
  • Steel Division: Normandy 44
  • Stellaris - Path to Destruction bundle
  • Hearts of Iron IV: Expansion Pass
  • Stellaris: Leviathans Story Pack
  • Hearts of Iron IV: Colonel
  • Hearts of Iron IV: Cadet
  • Stellaris Sign-up
  • Hearts of Iron IV Sign-up
  • Stellaris
  • Cities: Skylines - Snowfall
  • Cities: Skylines - After Dark
  • Cities: Skylines
  • 500k Club
Does the ring orbit the central mass of stars, or do they just happen to co-exist?

It could possibly be that this is some sort of galactic collision-event that ended up with the older galaxy capturing the younger one? And due to gravity-effects, the older one has been "compressed" from a elliptical galaxy into its current spherical shape? Or is the "void" between the galaxies comrpised of "dark matter" ? ;)
 
Mar 18, 2016
1.725
7.164
I am not astrophysicist, but could it be that the centre stars gravitational pull would have over time made tha stars close to it to an spiral orbit closing the center star with every cycle thus increasing the mass in the centre and possibly even the centre star by collapsing stars to it when stars get too close in their orbit. Increasing center mass would in turn increase gravitational pull leading to a cycle in which the stars further and further from the center would be affected and be derailed to an spiral orbit towrds the center. Still the gravitational pull wouldn´t be enoug to collapse the hole galaxy at once.

We can see some spiral shapes in the ring which could be the remnants of the galagtic arms and there are some stars in the void ring between the center and tha ring that could be stars sliding towards the central mass.

ofcourse as I said I am not astrophysicist and might not have considered all things that could be affecting this thing, but that is just my hypothesis of what might be behind the anomaly.

Hi Khelder!

I'm about to make a huge and possibly unforgivable simplification but I hope it helps: In space, it's more useful to think of gravity as being a force that makes things orbit one another rather than a force which pulls things towards one another. If a star is orbiting the centre of the galaxy then it will stay in that same orbit forever unless something disturbs it. Therefore, the centre of Hoag's Object wouldn't have made the stars spiral down towards it unless something was acting to slow them in their orbit.

When something acts to slow their orbit then we do see a spirally-downwards trajectory. The best example of this is satellites which orbit the earth close enough to have very small wisps of the atmosphere in their path. These don't stop them but exert enough drag to slow them down, just in the way you describe. However, we have no evidence of anything that could have caused this whilst leaving both the core and the outer ring intact.

You're right that the outer ring of Hoag's Object does have intriguing shapes which could be the remnants of galactic arms. Many people, including Arthur Hoag himself, saw this as evidence that it was once a spiral galaxy. However, most spiral galaxies have cores which are full of hot, young, large stars, which is not what we see here. This adds to the puzzle.

is it possible that the sphere was gravitationally captured by the ring? or vice versa?

The ring capturing the sphere would be very unlikely, but the sphere capturing the ring is a reasonable hypothesis. However, it would have had to be built up over a number of captures rather than a single one, which is certainly unusual. It also doesn't explain why the outer stars got captured as a single perfect ring surrounded by an immense disc of dust and gas. That structure is so perfect and vivid that we've never seen anything like it result from a capture scenario.

That said, it's not as if there's an orthodoxy on the matter. You will probably find people in academia who agree with you.

Type III civilisation confirmed.

I know you're joking, but some days I actually agree with you.

Hey BeautifulVoid,
I've seen your series for the first time today, and I wanna give you a massive thank you! It's a really interesting read and fuel for my imagination. Went back to Crab nebula so far.. oh boy there is just so much out there, too bad we're all born too early before we somehow manage to overcome physics and just fly around there. Space tourism for the win ;-)

You're very welcome! If you have a favourite thing in space then please let me know, and I'll cover it sometime between now and D-0.

I think we're born at exactly the right time. We may never go to space, let alone travel the stars, but we are living exactly at the period where humanity is beginning to get really good at searching out other planets. This is the most interesting thing that humanity has ever done, and it allows us to lay the groundwork for the future.

If we ever manage to overcome physics, I shall be sad. I like physics.

Does the ring orbit the central mass of stars, or do they just happen to co-exist?

It could possibly be that this is some sort of galactic collision-event that ended up with the older galaxy capturing the younger one? And due to gravity-effects, the older one has been "compressed" from a elliptical galaxy into its current spherical shape? Or is the "void" between the galaxies comrpised of "dark matter" ? ;)

The ring and the core both orbit their shared centre of gravity, which is inside the core.

The "void" between the two has some stars in it, actually, as well as a lot of dust and gas. If you look at Hoag's Object using radio or infrared astronomy then the "ring" effect isn't nearly as vivid or as beautiful.

If the void was comprised of dark matter, we wouldn't be able to detect it at all - "dark" is astronomer-speak for "we know it's out there somewhere but we have no idea where."
 
  • 4
  • 1
Reactions:

Murmeldjuret

01_COUP_PROPOSE
95 Badges
Dec 14, 2010
975
3.137
  • Victoria 2
  • Knights of Pen and Paper +1 Edition
  • Leviathan: Warships
  • Arsenal of Democracy
  • Stellaris - Path to Destruction bundle
  • Europa Universalis IV: Res Publica
  • Rome Gold
  • Semper Fi
  • Sengoku
  • Sword of the Stars II
  • Crusader Kings II: Monks and Mystics
  • Magicka
  • Victoria 2: A House Divided
  • Victoria 2: Heart of Darkness
  • Europa Universalis IV: Rights of Man
  • Crusader Kings II: Jade Dragon
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Pre-order
  • Europa Universalis IV: Third Rome
  • Stellaris: Galaxy Edition
  • Cities: Skylines - After Dark
  • Europa Universalis IV: Mare Nostrum
  • Crusader Kings II: Sword of Islam
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Europa Universalis III
  • Europa Universalis III: Chronicles
  • Europa Universalis III Complete
  • For the Motherland
  • Heir to the Throne
  • Hearts of Iron III Collection
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • Divine Wind
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Art of War
  • Crusader Kings II: Holy Knight (pre-order)
  • Europa Universalis IV: El Dorado
  • Crusader Kings II: Way of Life
  • Pillars of Eternity
  • Hearts of Iron IV: La Resistance
  • Europa Universalis III Complete
  • Europa Universalis IV: Cossacks
What is the age of the younger stars and older stars, and how large is the age gap?

Do we know the dynamic of their orbit in its local cluster, as such, can we extrapolate its original path?
 
Mar 18, 2016
1.725
7.164
What is the age of the younger stars and older stars, and how large is the age gap?

Do we know the dynamic of their orbit in its local cluster, as such, can we extrapolate its original path?

The core stars are about 10 billion years old or older. Most of the outer stars are around 2 billion years old, and there is evidence of ongoing star formation there.

As for the local cluster: I'm afraid we're out of luck there. Hoag's Object is pretty isolated. The nearest galaxy (CGCG 135-050) is 3 million parsecs away, which is a long way. This adds to the mystery.
 
  • 1
Reactions:

Tim_Ward

General
23 Badges
Sep 7, 2015
2.299
5.890
  • Europa Universalis IV: Art of War
  • Europa Universalis IV: Wealth of Nations
  • Hearts of Iron III
  • Naval War: Arctic Circle
  • Europa Universalis IV: Res Publica
  • Europa Universalis IV: Cossacks
  • Stellaris: Lithoids
  • Stellaris: Ancient Relics
  • Stellaris: Megacorp
  • Stellaris: Distant Stars
  • Stellaris: Apocalypse
  • Stellaris: Humanoids Species Pack
  • Stellaris: Synthetic Dawn
  • Stellaris - Path to Destruction bundle
  • Stellaris: Leviathans Story Pack
  • Stellaris: Digital Anniversary Edition
  • Stellaris
  • Europa Universalis IV: Common Sense
  • Pillars of Eternity
  • Europa Universalis IV: El Dorado
  • Victoria 2
  • Crusader Kings II
Post forever.
 
  • 3
Reactions:

Wyrm

General
31 Badges
Dec 7, 2003
1.801
1.482
  • Surviving Mars
  • BATTLETECH: Heavy Metal
  • BATTLETECH: Season pass
  • Hearts of Iron IV: Expansion Pass
  • Stellaris: Megacorp
  • BATTLETECH: Flashpoint
  • Stellaris: Distant Stars
  • Hearts of Iron IV: Expansion Pass
  • Cities: Skylines - Parklife
  • Cities: Skylines - Parklife Pre-Order
  • Stellaris: Apocalypse
  • Stellaris: Humanoids Species Pack
  • Hearts of Iron IV: Expansion Pass
  • Age of Wonders III
  • Stellaris: Synthetic Dawn
  • Hearts of Iron IV: Death or Dishonor
  • Hearts of Iron III
  • BATTLETECH
  • Steel Division: Normandy 44
  • Stellaris - Path to Destruction bundle
  • Hearts of Iron IV: Expansion Pass
  • Stellaris: Leviathans Story Pack
  • Hearts of Iron IV: Colonel
  • Hearts of Iron IV: Cadet
  • Stellaris Sign-up
  • Hearts of Iron IV Sign-up
  • Stellaris
  • Cities: Skylines - Snowfall
  • Cities: Skylines - After Dark
  • Cities: Skylines
  • 500k Club
The age of the core makes me wonder another thing... (this is the upside of not being a thorough-bred astrophysicist, you don't know the limitations ;) )
Could this core have undergone some sort of event billions of years ago that threw out insane amounts of stellar matter that eventually got recaptured and is now acting as a young galaxy? I'm thinking "super-nova" on a galactic scale here...
 

Murmeldjuret

01_COUP_PROPOSE
95 Badges
Dec 14, 2010
975
3.137
  • Victoria 2
  • Knights of Pen and Paper +1 Edition
  • Leviathan: Warships
  • Arsenal of Democracy
  • Stellaris - Path to Destruction bundle
  • Europa Universalis IV: Res Publica
  • Rome Gold
  • Semper Fi
  • Sengoku
  • Sword of the Stars II
  • Crusader Kings II: Monks and Mystics
  • Magicka
  • Victoria 2: A House Divided
  • Victoria 2: Heart of Darkness
  • Europa Universalis IV: Rights of Man
  • Crusader Kings II: Jade Dragon
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Pre-order
  • Europa Universalis IV: Third Rome
  • Stellaris: Galaxy Edition
  • Cities: Skylines - After Dark
  • Europa Universalis IV: Mare Nostrum
  • Crusader Kings II: Sword of Islam
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Europa Universalis III
  • Europa Universalis III: Chronicles
  • Europa Universalis III Complete
  • For the Motherland
  • Heir to the Throne
  • Hearts of Iron III Collection
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • Divine Wind
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Art of War
  • Crusader Kings II: Holy Knight (pre-order)
  • Europa Universalis IV: El Dorado
  • Crusader Kings II: Way of Life
  • Pillars of Eternity
  • Hearts of Iron IV: La Resistance
  • Europa Universalis III Complete
  • Europa Universalis IV: Cossacks
The core stars are about 10 billion years old or older. Most of the outer stars are around 2 billion years old, and there is evidence of ongoing star formation there.

As for the local cluster: I'm afraid we're out of luck there. Hoag's Object is pretty isolated. The nearest galaxy (CGCG 135-050) is 3 million parsecs away, which is a long way. This adds to the mystery.

10 Billion is rather old, so could it not be that the galaxy is formed from one of the early stars from the primordial era, that lived past its date. Then it blew up and in the absence of other gravitational forces collapsed back to a spherical shape? Though this would mean that it contains much less % of heavy material, the ring is far thicker than normal, and that the orbital characteristics on the cloud are indicative of this. (I deal with spectrography not stellar physics so I could be grasping at straws)
 
  • 1
Reactions:
Mar 18, 2016
1.725
7.164
10 Billion is rather old, so could it not be that the galaxy is formed from one of the early stars from the primordial era, that lived past its date. Then it blew up and in the absence of other gravitational forces collapsed back to a spherical shape? Though this would mean that it contains much less % of heavy material, the ring is far thicker than normal, and that the orbital characteristics on the cloud are indicative of this. (I deal with spectrography not stellar physics so I could be grasping at straws)

If you're a spectrographer then you might enjoy this paper by Finkelman et al. Brosch is on it, naturally. It answers that question far more fully than I could here.

What's that? A place full of this?




The age of the core makes me wonder another thing... (this is the upside of not being a thorough-bred astrophysicist, you don't know the limitations ;) )
Could this core have undergone some sort of event billions of years ago that threw out insane amounts of stellar matter that eventually got recaptured and is now acting as a young galaxy? I'm thinking "super-nova" on a galactic scale here...

The core has a lot of stars in it. It is unlikely that such an event would occur and not destroy those stars.
 
  • 1
Reactions: