Celestia Forums

Does Celestia come with any nebulae or do you have do get them seperately? I can't finy any in search.

srr wrote:Does Celestia come with any nebulae or do you have do get them seperately? I can't finy any in search.

WHAT!?

In Celestia 1.4.1 we have implemented 10000+ beautiful galaxies, precisely the entire corrected NGC/IC catalog.

I am sure Selden can tell you precisely how to display them. But you NEED version 1.4.1.

Bye Fridger

Does Celestia come with any nebulae or do you have do get them seperately

In Celestia 1.4.1 we have implemented 10000+ beautiful galaxies

Does Celestia consider them to be the same?

t00fri wrote:WHAT!?

In Celestia 1.4.1 we have implemented 10000+ beautiful galaxies, precisely the entire corrected NGC/IC catalog.

I am sure Selden can tell you precisely how to display them. But you NEED version 1.4.1.

Bye Fridger

There's a difference between nebulae and galaxy.

Celestia does not come with nebulae, you have to download add-ons.

Johaen wrote:

t00fri wrote:WHAT!?

In Celestia 1.4.1 we have implemented 10000+ beautiful galaxies, precisely the entire corrected NGC/IC catalog.

I am sure Selden can tell you precisely how to display them. But you NEED version 1.4.1.

Bye Fridger

There's a difference between nebulae and galaxy.

Celestia does not come with nebulae, you have to download add-ons.

Oh blame on me! Of course I know the difference between nebulae and galaxies . I just misread it, since so many people tend to mix up nebulae and galaxies, notably also since formerly in Celestia the two effectively meant the same thing.

Indeed, we are working to also incorporate nebulae and galactic clusters, besides galaxies. But that will still take a while.

Bye Fridger

No Nebula objects are currently included with any version of Celestia. You will have to download them from some Web site.

http://www.celestiamotherlode.net/ is one site you might look at.


However, please remember that Celestia's Nebula objects are not the same as Celestia's Galaxy objects.

A Nebula catalog entry usually includes a 3D Mesh declaration. Celestia draws the corresponding 3D object at the location specified in its DSC catalog file.

A Galaxy catalog entry usually includes an astronomical galaxy classification declaration. Celestia draws an internally defined 3D representation of that type of galaxy at the location specified in its DSC catalog file.

Fridger and Toti have put quite a lot of effort into making these representations of galaxies look reasonable and into generating an astronomically accurate catalog of galaxies. Celestia v1.4.0 (and later) includes these Galaxy objects and a large accurate catalog of galaxies. Both were improved for Celestia v1.4.1.

Some people have generated Nebula Mesh objects which display photographs of galaxies. Usually they're flat 2D photographs drawn on thin, rectangular 3D "billboard" objects. They show galaxies only as they are seen from Earth.

Many decades ago most extended light sources in the sky were called nebulae. It was not known that some of the fuzzy patches of lights in the sky were remote collections of stars that we
now call galaxies. Many were thought to be glowing clouds of gas.