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Forum » SpaceEngine » Space Journeys » Challenge: Smallest galaxies
Challenge: Smallest galaxies
Gondor2222Date: Thursday, 22.11.2012, 06:07 | Message # 1
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I've started this thread so we can find the minimum sizes various galaxy classifications go to. I'm particularly interested in the smallest Irr, E0, E1, E7, S0, Sa, Sb, Sc, SBa, SBb, and Sbc galaxies but candidates for smallest elliptical galaxies of other classes are welcome. The galaxies must be randomly generated

So Far I've found a few; the Ellipticals are small that their core cluster takes up over 2% of their volume (it would seem the core cluster has a constant size for every galaxy).


credit to NovaSilisko for this E0

credit to smjjames for this E2






credit to smjjames for this Irr


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Edited by Gondor2222 - Saturday, 05.01.2013, 01:34
 
smjjamesDate: Thursday, 22.11.2012, 07:13 | Message # 2
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There are some really small dwarf galaxies in the local group.

Also, I believe there is an even smaller irregular galaxy, but it's embedded inside a much larger irregular galaxy and SE crashes if you try to get close to it.





 
Gondor2222Date: Thursday, 22.11.2012, 22:53 | Message # 3
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Ah, I guess I'd better add the requirements that it be randomly generated.
 
jimyjoe76Date: Saturday, 08.12.2012, 04:11 | Message # 4
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Pretty small E1 Galaxy, if I do say so myself happy

Attachments: 9587149.jpg(107Kb)
 
smjjamesDate: Wednesday, 02.01.2013, 17:49 | Message # 5
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I've got an irregular galaxy that's even smaller. It's so dense with stars that it takes forever to load all the stars while approaching it.



Tiny dwarf galaxy that's the same size as a huge globular cluster. It's also pretty close (in relative terms), 1.5 Mpsc which comes out to about 4.89 million light years.


Edit: Found an even tinier one. This is at 7.761 Gpsc, which comes out to.... 25 billion light years?? I know it's over twice the age of the universe (if you go by about 13-14 billion years as the age), but we're factoring expansion here as well.

Attachments: 8544387.jpg(111Kb) · 5250086.jpg(94Kb) · 2830912.jpg(93Kb)







Edited by smjjames - Wednesday, 02.01.2013, 18:39
 
TimDate: Wednesday, 02.01.2013, 22:18 | Message # 6
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Only a 110 pc in diameter? How is that even possible? :P

Edited by Tim - Wednesday, 02.01.2013, 22:19
 
smjjamesDate: Thursday, 03.01.2013, 00:30 | Message # 7
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Rogue globular cluster maybe? I suppose a collision or a close encounter with one or more galaxies wold throw some globular clusters out of orbit.






Edited by smjjames - Thursday, 03.01.2013, 00:32
 
TimDate: Thursday, 03.01.2013, 08:47 | Message # 8
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I indeed believe it's possible, but shouldn't it take billions of years before that globular cluster gets far enough to even be noticeable?
I'll give it a visit later to measure it's oldest stars and the distance to the closest galaxy.

You're probably right, the closest galaxies (even though all of them are small) are just a few kpc away. The oldest stars I found were about 5 billion years old so I believe that's acceptable. Most of them however are only a few hundred million years old.
I also found a planet with life in this dense area.


Edited by Tim - Thursday, 03.01.2013, 09:19
 
NovaSiliskoDate: Friday, 04.01.2013, 07:15 | Message # 9
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I found a very tiny one:

 
Gondor2222Date: Saturday, 05.01.2013, 01:35 | Message # 10
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I wonder if there's a lower limit on the sizes the algorithm generates, and if so I wonder if any of them get smaller than 100 pc in diameter...
 
smjjamesDate: Saturday, 05.01.2013, 08:43 | Message # 11
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The only one that I know of that is smaller than 100pc is a 55 pc or something irregular which is embedded inside a much larger irregular galaxy. Not sure if that catalog galaxy is actually correct though.

SE crashes if you even get close to that galaxy because it would be so incredibly dense inside there.





 
werdnaforeverDate: Sunday, 08.09.2013, 07:36 | Message # 12
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I found a small irregular galaxy!

Attachments: 7670217.png(105Kb)
 
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