Sky River Project

[BobHegwood]

Spaceman,

Have a look at THIS link and see what you think.
If planets can easily form around multiple star systems, then why cannot comets? Sorry, but I still don't buy the conclusion that comets would
not exist in multiple star systems.

Just my opinion, obviously, but I still don't see any reason why comets would be negated simply because of the existence of more than one star.
Again, their orbits might be a bit more chaotic and perturbed, but then so are many of the orbits of the comets in our own Solar System. We have
observed comets which visit the center of our Solar System only every 50,000 years or so, so why wouldn't these exist in a multiple star system?

Please note the quote too...

Astronomers using NASA's Spitzer Space Telescope have observed that planetary systems – dusty disks of asteroids, comets and possibly planets – are at least as abundant in twin-star systems as they are in those, like our own, with only one star.

Sorry. I'm probably beating a dead horse here, but I just cannot believe the proposition that they would not exist in multiple star systems.

[Spaceman]

Somebody said that Universe in not just more strange than we imagine, but is also more strange than we could imagine. I will start to put comets around every star with planets, even if they have also companion stars

[BobHegwood]

Somebody said that Universe in not just more strange than we imagine, but is also more strange than we could imagine. I will start to put comets around every star with planets, even if they have also companion stars

Please note that I'm not trying to force you to do this. Did the link above help though? It seems to say that
there ARE comets, asteroids, and planets in abundance around multiple star systems. You concur?

[Spaceman]

You didn't force me, i just didn't know how possible is this
How about comets around the central star and the companion stars? This will be cool
Thanks

[Spaceman]

I reset again the addon, with new interesting updates. Now the clusters will have 3.000 stars and will have 2.000 light years diameter, placing there centers about 2.000 light years from each other. Some binary systems will have planets, moons, asteroids and comets, but not all. Just click to the next image to learn why.

New type of planet, the Venusian, using the default textures from Celestia

venusian.jpg

Epistellar giant will have the default night textures from Celestia

epistellar.jpg

Pulsars are upgraded for a more realistic result

pulsar.jpg

According to this website, some giant planets that are also exist to the extrasolar.ssc are inside habitable zones. This addon will put fictional Earth-like moons orbiting around these giants
These are the most important updates for now. What next? Who knows. Sorry if i become annoying with all these, put i am very excitement with this addon (perhaps too excitement )

[Spaceman]

Hello

I have brilliant news. Rassilon allows me to use more of his textures for the Sky River Project . The textures are from his addons, like Altair System and Mira System. With the new textures, more cool planets are coming

gas.jpg

And a new type of object, the Unknown Megastructure

megastructure.jpg

Yeah, my addon will have a little puzzle to solve. Travelers from all the Galaxy report these strange artificial "planets". Who build them? When? Why? What are these megastructures? Are they still operative, because of the lights? There are lots of explanations, but nobody knows. Space colonies? Under construction artificial planets? Giant computers? Information stores? Scientific laboratories? Transportation systems? Defense systems? Power Plants? Surveyors? Mining operations? Or something that we can't even imagine? These structures are the biggest mystery and many advance space civilizations believe that the creators of these spheres are still living around in the Galaxy, a believe that some makes them happy and at others bring fear to their hearts.
I also make some experiments. Look at this picture.

blackhole.jpg

Here is how i make it:

Code: Select all

"X 118323+1" "Yuri Gagarin"
{
   Texture "gc_black.jpg"
   Radius 100
        Color [0.1 0.0 0.1]
   Emissive true
   EllipticalOrbit
   {
   Period           164.793
   SemiMajorAxis     30.0690
   }
   RotationPeriod 0.05
   Atmosphere {
      Height 4.5
      Lower [ 0.3 0.1 0.3 ]
      Upper [ 0.2 0.2 0.6 ]
      Sky [ 0.0 0.2 0.6 ]
      }
   Rings {
      Inner   25
      Outer   500
      Texture "gc_rings_16.png"
      Color   [ 0.00 0.00 1.00 ]
   }
}

The Atmosphere commands are taken from Black Hole 108 Nebula and my Rings commands create the accretion disk. I hope that you like it

[Spaceman]

Hello

I need to make my doctorate for the university, so the progress of my addon will be stopped! I have lot's of work, so no "Sky River Project" for now

[selden]

Might there be some way you could use Celestia to illustrate your thesis?

I suspect there would be many people interested in that kind of usage. A thread in the Education forum might be appropriate.

[t00fri]

Because how realistic is a comet orbiting around a central star, having and other stars orbiting around the central star? For me, it's unrealistic.

Life is not always so easy . Instead, I have simply calculated the effect of multiple stars on comets and their tails (that I have also implemented in Celestia). This seems a much more solid procedure than just stating : For me, it's unrealistic..

This is physics and I am a physicist. If you have a solid argument, I will be able to understand it...


Fridger

[BobHegwood]

Because how realistic is a comet orbiting around a central star, having and other stars orbiting around the central star? For me, it's unrealistic.

Life is not always so easy . Instead, I have simply calculated the effect of multiple stars on comets and their tails (that I have also implemented in Celestia). This seems a much more solid procedure than just stating : For me, it's unrealistic..

This is physics and I am a physicist. If you have a solid argument, I will be able to understand it...

Good Doctor,

See my previous posts in this thread. Just wanted to point out that we actually agree on a physics topic here.
Will wonders never cease?

[Spaceman]

Might there be some way you could use Celestia to illustrate your thesis?

I suspect there would be many people interested in that kind of usage. A thread in the Education forum might be appropriate.

You mean my doctorate for the university? It's about light pollution and it's affects to the environment. I'm studding at T.E.I. (Technological Educational Institute) of Zakinthos (Greek island) about environmental technology, not astronomy

By the way, i wanna tell something. Look at this picture.

galaxy.jpg

The red point is our Sun and the circle, a nebula addon from selden, has radius 16.000 light years. Once, we could build stars only inside this circle. Now we can build them anywhere in the Galaxy. I didn't cover larger areas of our Galaxy yet, so I'm still at the start

[selden]

You mean my doctorate for the university? It's about light pollution and it's affects to the environment. I'm studding at T.E.I. (Technological Educational Institute) of Zakinthos (Greek island) about environmental technology, not astronomy

Well, Celestia does depict things like clouds (poorly), night-time city lights (light pollution!) and Mie and Rayleigh scattering. I suspect there are other programs which can do a better job of showing 3D effects in the atmosphere, though.

[t00fri]

Might there be some way you could use Celestia to illustrate your thesis?

I suspect there would be many people interested in that kind of usage. A thread in the Education forum might be appropriate.

You mean my doctorate for the university? It's about light pollution and it's affects to the environment. I'm studding at T.E.I. (Technological Educational Institute) of Zakinthos (Greek island) about environmental technology, not astronomy

By the way, i wanna tell something. Look at this picture.

galaxy.jpg

The red point is our Sun and the circle, a nebula addon from selden, has radius 16.000 light years. Once, we could build stars only inside this circle. Now we can build them anywhere in the Galaxy. I didn't cover larger areas of our Galaxy yet, so I'm still at the start

How about learning how to display my nice galaxies PROPERLY by means of appropriate SHIFT_mouse_Left and CTRL_mouse_left drags !?

I always suffer a lot when I have to look at such mutilated displays like yours above...

The MilkyWay should rather look like this (with the Sun also indicated in the Orion arm):



Next, what you seem to be after, I have long done. Here is a corresponding thread at our CelestialMatters site with plenty of VERY illustrative videos.

http://forum.celestialmatters.org/viewt ... 10&start=0

Sometimes it's good to have a look there, too

I generated lots of orbiting stars in a cluster both in the center of the MilkyWay and in M31, the Andromeda galaxy.

If your internet line is not superfast, you have to first download the videos and then play them, since I chose a pretty large format.

Fridger

[Cham]

Fridger,

how did you added the arms names ? There should be an option to show these, in Celestia, as for the constellation names (same for the voids and super-clusters, as discussed elsewhere).

Or I may create a small "layer" to add some floating labels on the MW... This should be easy to do.

[t00fri]

Fridger,

how did you added the arms names ? There should be an option to show these, in Celestia, as for the constellation names (same for the voids and super-clusters, as discussed elsewhere).

Or I may create a small "layer" to add some floating labels on the MW... This should be easy to do.

Martin,

this image is from "pre-layer" days. I just used the GIMP.

How do layers act under different viewing angles of the Galaxy? Is the text always well readable?

Fridger

[Cham]

How do layers act under different viewing angles of the Galaxy? Is the text always well readable?

I'm working on the layer right now, since I just returned home few minutes ago.

Well, no, the text isn't readable as seen from the side. This is a feature, actually ! You can read the text only when viewing the MW in the proper orientation. I'll try two ways : text in the galactic plane, and text perpendicular to the galactic plane (so it can be seen from inside the solar system). I think the first way should be the better configuration of "floating labels", in this case.

[Cham]

Here's a first version (made in 5 minutes). I'll have to tweak the colo used, and there's at least one more name to add. I don't know yet if the names should be curvy, flowing along the arms. Any opinion on this ?

MW.jpg

This small layer can be switched ON with several other layers. Here are three layers turned ON seperately :

layers.jpg

[Cham]

Hmmm, I'm not sure this idea is a good one. In many cases, the semi-translucid text is hard to read, or too small, or too big, or in the wrong orientation. Hard coded constelation-style labels should be a necessity here.

MW2.jpg

[t00fri]

Hmmm, I'm not sure this idea is a good one. In many cases, the semi-translucid text is hard to read, or too small, or too big, or in the wrong orientation. Hard coded constelation-style labels should be a necessity here.

MW2.jpg

That was my impression, too. How about changing color, like e.g. some nice French-green
(darkish blue-green) ?

Fridger

PS: I am mostly worried about the fact that in many views one cannot read the layer text. That's sort of "primitive" for my standards (not your fault, of course)

Fridger

[Cham]

I'll try other colors, but I don't think it will be enough. In this special case, floating labels aren't doing the job well, since the typical user also moves around and inside the MW. The labels should be adaptable (in size and orientation) in this case.