Stellar Forge - Post oddities / bugs here !

[Hanni79]

It seems there are still some problems present within Stellar Forge. Therefore I would like to appeal my fellow commanders for feedback :

If you found odd orbits, planets or moons behaving strangely, or similar oddities / bugs, post them here

Spoiler

View attachment 1475

As you can see, Zamka City has a regular ( probably fatal ) rendezvous with the "moon".
First, two planets of roughly equal size should orbit around a central mass point, not one orbiting the other ( I think).
Furthermore, obviously something went wrong with the orbit of Zamka City.

More Pics by Thebuzwell : http://imgur.com/a/uHcKA

 

[Hanni79]

This seems to me like an impossible orbit constellation, it is from Beta 3.0x but I'm sure I have seen those in Gamma as well :

View attachment 2726

I think an orbit like this wouldn't work in real life, is this a bug, or does this indeed work like this ?

Edit : I stand corrected, this indeed works. But I still guess the constellation in the first post is incorrect ... not sure if this was changed for Gamma, though.

 

[cmdr awesome]

O RLY?

http://en.wikipedia.org/wiki/Double_planet

DB mentioned once that he was surprised about the high number of binary planets in systems - it was unclear whether that was a comment about Stellar Forge, the galaxy, or both.

This may turn into a thread where you can post an oddity and have it explained by an astronomer (Calling Dr Wookie!)

 

[CMDR Sheehy]

To be honest, after looking what goes on around Saturn, courtesy of Cassini, there's very little that can surprise me.

There are two moons that, on the faster catching up, they meet up and swap orbits, the slower one speeding up to play catchup and the former slowing down.

 

[Hanni79]

@ cmdr awesome :

Dammit, you are right. I somehow messed up when I tried to imagine the orbits of two bodies revolving a common centre of mass. Ah, I know, I assumed the same orbit speed, which they don't necessarily (in fact can't ) have. Made the wrong assumption obviously. Thanks for the Link.

 

[alexios]

I think an orbit like this wouldn't work in real life, is this a bug, or does this indeed work like this ?

O RLY?

http://en.wikipedia.org/wiki/Double_planet

Binary planets should be orbiting around their combined centre of mass. If this is happening in this case (and it looks like it is), shouldn't the HUD be displaying a single orbit? Instead, it's showing two sort-of concentric orbits around what should be another object.

 

[SmileyMan]

Binary planets should be orbiting around their combined centre of mass. If this is happening in this case (and it looks like it is), shouldn't the HUD be displaying a single orbit? Instead, it's showing two sort-of concentric orbits around what should be another object.

Only if they were identical masses. All two-body systems can be represented as orbiting a point called the barycentre. One common definition of a double planet is where the barycentre is outside of both bodies - the only one in our solar system is Pluto-Charon (a double-minor planet?)

If the two bodies have significantly different masses, then you'll see two orbits, which will be exactly concentric (on the barycentre) and the two bodies will always be on opposite sides.

 

[CMDR Sheehy]

Only if they were identical masses. All two-body systems can be represented as orbiting a point called the barycentre. One common definition of a double planet is where the barycentre is outside of both bodies - the only one in our solar system is Pluto-Charon (a double-minor planet?)

If the two bodies have significantly different masses, then you'll see two orbits, which will be exactly concentric (on the barycentre) and the two bodies will always be on opposite sides.

Soooo... exactly like the image above?

 

[Hanni79]

Soooo... exactly like the image above?

Exactly.

 

[bujin]

I saw a similar system last night (may even have been the same one).

I have no problem with two planets orbiting each other in this way. However, I have strong suspicions (not backed up by any form of calculations, admittedly), that the stations in orbit around each planet would have some orbital stability issues.

 

[Avnas]

i saw some dual 'hell' planets that were so close they were almost touching

 

[CMDR Sheehy]

I saw a similar system last night (may even have been the same one).

I have no problem with two planets orbiting each other in this way. However, I have strong suspicions (not backed up by any form of calculations, admittedly), that the stations in orbit around each planet would have some orbital stability issues.

Probably true. But saying that, even the ISS has stability problems. It needs a boost as it's constantly slowing down due to atmospheric braking. Scientists at one time believed that systems with more than one star could not sustain planets at all. They surmised that planets would get kicked out of orbit. However, when they actually looked and started to see exoplanets, they found them orbiting binaries.

Nature has a strange way of balancing things out. La Grange points are an example of this. You'd think it can't happen, but there it is.

 

[SmileyMan]

I have no problem with two planets orbiting each other in this way. However, I have strong suspicions (not backed up by any form of calculations, admittedly), that the stations in orbit around each planet would have some orbital stability issues.

For that, you need to know about the Hill Sphere (http://en.wikipedia.org/wiki/Hill_sphere). For a binary system where the masses are nearly equal, this extends to about 34% of the distance between them (which is quite surpisingly large). Anything in a low orbit will be perfectly safe