Snöken

@tofilwiktor Still planning on working on this? Otherwise I would like to give it a go.

@alex-w I have renamed the existing lagrange-points and added the L4 and L5 points for the earth-moon system @Atque Thought about it, but wouldn't it be cluttered? Especially seeing as...

Realized that my implementation does not take into account if the common plane between the two bodies is different from the ecliptical plane. Will fix that.

> Earth-Moon lagrange points should be visible from Earth only This has been fixed

> L1, 2, 3 would be more clearly visible when observed from the associated "planet observer". Also, if they are computed with the planetocenter, an observer on the surface will...

> When observing from Earth Observer, I expect to find L4, L5 somewhere close to Earth's orbit line. However, they are at no location that appear to make sense. Yes,...

@gzotti If you would please have a look at [2e838ba](https://github.com/Stellarium/stellarium/pull/3090/commits/2e838baaa06c8378a9dd909f09c4f1a4fec963a0). Been sure to make my testing more extensive and can at the very least confirm that the vectors (in the...

I may misunderstand the issue, but when I am observing from Earth Observer L4 and L5 are very close to the orbit line.  

> If you then move away from the earth (Alt+End), you will see this. Gotcha! This has been fixed! 

> OK, some cosmetic fixes (like: “L4(Sun-planet)” -> “L4 (Sun-planet)”) may be fixes before merging. Also fixed this in the commit, though it is not visible in the screenshot as...