galaxies and cluster.dat file....?

Guest · Post #1by **Guest** » 23.04.2003, 22:18

when i am doing a search with "go to" function of some galaxy i have nothing in return(except for the major m31 etc..) ...

why?

i have put the "galaxies_and_clusters.dat" file in the data folder...

what is wrong?

:?:

thanks

Post #2by **selden** » 23.04.2003, 22:48

Which version of Celestia are you using?

If you are using Celestia v1.2.x then you have to completely replace the file /data/galaxies.dat. In other words, rename galaxies_and_clusters.dat to be galaxies.dat

If you are using Celestia v1.3.0, however, then galaxies_and_clusters.dat is of no use to you. You need DSC (Deep Space Catalog) files instead.

The equivalent DSC files are available at http://www.lns.cornell.edu/~seb/celestia/catalogs.html

Guest · Post #3by **Guest** » 24.04.2003, 00:38

many thanks...

but were i can find a valid mesh (for example "roughsphere.cms") for planetary nebulaes?

:?:

Post #4by **selden** » 24.04.2003, 01:08

So far none of the artists among us have created any planetary nebula objects.

I tried using a 3DS sphere with a translucent surface texture, but it really looks awful. I think doing it right will have to wait until Celestia can do what is called "volumetric rendering".

The canonical planetary nebula, for example, is a spherical shell of gas. It looks like a smoke ring because we're looking through more material near the edges of the sphere than we look through at its center.

In the meantime, I suppose someone could use a "billboard" object to place pictures of some of the planetary nebulae in appropriate locations.