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Laniakea cmod model?

Posted: 10.09.2016, 18:58
by john71
What do you think, is it possible to make a Laniakea supercluster cmod model?

Can it be done?

+ Do you know any add-on which shows the names of the Milky Way arms?

+ Any star collection add-ons containing stars in the observational shadow of the Milky Way?

Posted: 10.09.2016, 19:50
by selden
What do you think, is it possible to make a Laniakea supercluster cmod model?

Can it be done?
Yes. You "just" need a catalog of all 100,000 galaxies and then translate them into Celestia's xyz coordinates. (I don't plan to do it. I'm in the middle of too many other things already.)
+ Do you know any add-on which shows the names of the Milky Way arms?
Yes.

One step of the Addon that I created of Orion's Arm wormholes projects the NASA/Spitzer galaxy artwork onto the plane of the Milky Way.
Install it, run its script, type an ESC while that map is being shown and then you can change your viewpoint however you want.
http://www.classe.cornell.edu/~seb/celestia/orions_arm/index.html#4.0
+ Any star collection add-ons containing stars in the observational shadow of the Milky Way?
No. They'd be entirely imaginary, of course, although one could (in principle, at least) use montecarlo techniques to generate stars with appropriate spatial and stellar type distributions. Cham sometimes does that kind of thing.

Posted: 10.09.2016, 20:35
by john71
Thank you for your reply!

One more thing: do you think that the Milky Way texture in Celestia is accurate? I see different representations of the Orion and Perseus Arm...I hope that Celestia has the right one...

Posted: 10.09.2016, 23:42
by selden
The exact shape of our galaxy is a topic of ongoing research. While the major features are likely to be about right, details are not so well known. The shapes of the arms are estimated from the positions of clouds of gas and dust as measured using radio and infrared telescopes. Where one arm ends and another starts often is ambiguous. After all, we have no way to go outside the Milky Way to take a picture of it.

Posted: 11.09.2016, 03:49
by omega13a
selden wrote:After all, we have no way to go outside the Milky Way to take a picture of it.
At least for the foreseeable future. ;)