Te lo parece?

I'm loving how bold this is. Also wow you could really make a cool fringe on display versions of this flag too. Love the gold/yellow.

I feel like you could make this work, but I feel it needs to be more "eye-catching," but that might mean you have to change the colors, or sometimes start from scratch. Believe it or not, you can simplify this more. The things that have run into my head are:
1) instead of the figure pushing the world, it can be inside one of the "pies"
2) That being said, the other 3 triangles can be occupied by the other races
3) The circle can be a gear to represent industry. Or both the world and the sun can be encircled by gears and moving each other.
4) Maybe the overall color should be vibrant, like blue for blue collared workers

But those are just my suggestions : )

Thank you very much for your suggestions. What you mention looks more like a shield than a flag. (And I think it would be a good idea to do so.) The gears, as a symbol, are typical of human culture. Here we are creating symbols to represent an extraterrestrial civilization that never had contact with humans, (until much later). That's why I didn't want to use things that were too complex. The circle and the star are elements that exist in nature (planets and stars), and they can be references for any civilization. And I didn't want to use more colors, because this is just a symbol, not a complex art. I tried to be as simple as possible. Thanks again!

I'll take into the account the things you told me that shouldn't be in the flag, such as no human involvement.
I can show you what my other suggestion looks like, but only if you allow.

Ok, if you want.