Replace the green with yellow?
But dark yellow looks horrible, so it leaves me with this. And I want green in the flag, to represent "science" or maybe the environment in this Earthlier version.
I must also say that I think the first flag looks better than 2. And I don't really like the dark green, but I don't know what I could put instead. I think red rules out blue.
The yellow in the hammer and sickle is probably enough.
With a black part, I could add a Blastar as well. But what useful thing could black even symbolize...