Spirograph Nebula (Olagiar System)

Rassilon · Post #1by **Rassilon** » 02.03.2004, 02:36

Coming soon...

Cham · Post #2by **Cham** » 02.03.2004, 03:19

What the hell is that !? (LOL)

TERRIER · Post #3by **TERRIER** » 04.03.2004, 02:38

Nice

Looks like that 'shot's been taken from right in the centre.
That wouldn't happen to be a white dwarf would it ? :wink:

Rassilon · Post #4by **Rassilon** » 04.03.2004, 02:40

Arctic type world actually....

TERRIER · Post #5by **TERRIER** » 04.03.2004, 22:37

Rassilon wrote:Arctic type world actually....

Whoops

Just a slight difference then ? :lol:

Rassilon · Post #6by **Rassilon** » 05.03.2004, 02:35

Maybe a little :lol:

Rassilon · Post #7by **Rassilon** » 01.05.2004, 13:18

Ive uploaded this addon finally at sourceforge along with a few others...

http://sourceforge.net/project/showfile ... _id=102835

Guest · Post #8by **Guest** » 02.05.2004, 23:29

Looks really amazing

just a few questions though.
Isn't a planetary nebula supposed to be like a bubble?
And how realistic is a system like yours? 3 "levels" of moons? Rings around the main star? HUGE atmospheres? Pink stars (what was that?

)

Rassilon · Post #9by **Rassilon** » 03.05.2004, 14:22

Thank you for the feedback...

3 levels of moons...Companion star means multiple star system...There are moons of moons in our own system though rare...

Rings around stars are possible...Where is it said that its impossible?

Thick atmospheres are mainly cosmetic...

Pink stars again are cosmetic...I like to think anything is possible in a universe of infinities...

The bubble effect for planetary nebs quite plainly looks like crap...I prefer to use a more billboard/3d effect as you can see allows the neb to look more gassy than a large bubbleboy alien thing in space :p

btw the Baramal system will really make the realists hate me :mrgreen:

It has a red and purple star not to mention some really bizarre planets...I tend to try to keep my orbital parameters realistic but most of my systems will tend to be more dreamy than real...I prefer it that way...If I rely on what science dictates as 'real looking' all my systems would look like the solar system....

maxim · Post #10by **maxim** » 03.05.2004, 15:05

Anonymous wrote:Isn't a planetary nebula supposed to be like a bubble?

Not at all. Lok at this for example. Bubble nebula are quite seldom AFAIK.

maxim

Guest · Post #11by **Guest** » 03.05.2004, 16:05

wow
The baramal system looks amazing!

Good work on that one

And where are moons of moons in our system? Didn't know of any..

Cham · Post #12by **Cham** » 03.05.2004, 16:37

Rassilon wrote:Thank you for the feedback...

Rings around stars are possible...Where is it said that its impossible?
...

I'm not sure, but I think rings like that one around a star aren't possible because of the vast amount of space involved around a typical star.

To be visible, it will be of a HUGE mass. Because of gravitation, it will probably fragment itself into several pieces and turn into planets. Rings of that size cannot be stable, I guess (I'm not sure of this). The problem here is visibility. I think a stable ring around a star should be transparent.

Is someone able to confirm this ? Ok, then, lets vote ! :roll:

Guest · Post #13by **Guest** » 03.05.2004, 17:36

Cham wrote:
Rassilon wrote:Thank you for the feedback...

Rings around stars are possible...Where is it said that its impossible?
...

I'm not sure, but I think rings like that one around a star aren't possible because of the vast amount of space involved around a typical star.

To be visible, it will be of a HUGE mass. Because of gravitation, it will probably fragment itself into several pieces and turn into planets. Rings of that size cannot be stable, I guess (I'm not sure of this). The problem here is visibility. I think a stable ring around a star should be transparent.

Is someone able to confirm this ? Ok, then, lets vote !

Based on what we know of stars generally they are based around protostars or possibly younger stars...Its all hypothetical...Ringed stars I would figure is possible due to the fact its possible around brown dwarfs and gas giants....Why not stars?...I would figure stars of larger mass would be less likely to have rings vs stars of high density such as orange or red giants...Anyways I liked the ring around the star so....I put one there

Rassilon · Post #14by **Rassilon** » 03.05.2004, 17:44

^me

I think selden or grant might have a link or two to prove or disprove the possibility of stars having rings....I cant seem to find anything to credit or disprove the idea...

Post #15by **selden** » 03.05.2004, 18:40

There are lots of stars, mostly younger ones, with disks around them. (Do a google search for the terms "vega disk age"). See, for example, http://hubblesite.org/newscenter/newsdesk/archive/releases/1995/38/ and http://hires.gsfc.nasa.gov/stis/science/ppdhomepg/betapic.html, which show a very thin protoplanetary disk around Beta Pictoris. It's a very young star, though, only about 20MYears.

I would expect that disks thin enough to be represented by Celestia's ring object would be relatively rare, but not impossible.

Psykotik · Post #16by **Psykotik** » 03.05.2004, 18:52

Amazing, Rass', it's unbelievably amazing. You greatly improve the "artistic side" of Celestia with your addons, it's a great pleasure to browse these damn worlds ;-)

Thanks mate.

Cham · Post #17by **Cham** » 03.05.2004, 19:12

I feel a bit depressed with Celestia. The universe out there is so rich in possibilities, that I really feel many things are lacking in Celestia.

We need more strange or exotic objects, more addons. More stars with clouds around them, accretion disks, etc. Stars with jets, matter bridges between two stars. We needs more of the brutality out there : a neutron star or a black hole stealing gas from a red giant close to it, etc.

One thing which is truly lacking, in our 3D astronomy program, are tridimensionnal reprensentations of gaz and dirt clouds. 3D Nebulas.

Geez, there's surely a way. Why not making a model of, say, three or four intersecting surfaces with some semi-transparent textures on them ? Is this possible in Celestia ?

If only I had 3D modeling skills and the 3D tools on my computer :cry:

Rassilon · Post #18by **Rassilon** » 03.05.2004, 19:17

Thanks everyone for the input...It does help...

moons of moons...I think there is one in Saturns moon system...They exchange orbits if I remember correctly and sort of orbit each other...

Selden...celestia's ring ssc script doesnt work at all around stars...Emissives with rings placed around the stars have black rings...so generally Celestia's ring convention does not work...The way I did it was a 3ds file...

Geez, there's surely a way. Why not making a model of, say, three or four intersecting surfaces with some semi-transparent textures on them ? Is this possible in Celestia ?

By making seperate meshes inside of a singular model you can have different material assignments...One mesh can have a transparency and the other could be opaque...

Cham · Post #19by **Cham** » 03.05.2004, 19:18

Fuzzy objects. We need transparent objects without clear beginning or ending. Fuzzy transparent balls which let you go deep inside without be able to "touch them".

Chris ?

Post #20by **selden** » 03.05.2004, 19:22

Cham,

As I recall, you have a Mac, right?

There seem to be several freeware 3D modelling packages available for MacOS. See http://www.opengl.org/applications/macos/modeling/ and http://www.pure-mac.com/3d.html for a few examples. I'm sure most of them will export models to 3DS format.

It just takes time and practice to learn how to create 3D models.