Board Game Arena

Can someone explain what I'm doing wrong and why I can't make the federation.
I don't know that the mensage means.

You don't need to use any satellites to form a federation; the existing connected buildings have enough power.

The section without any satellites probably has enough power on its own. When I first played Ivits, I didn't realize space stations were worth one power each and counted towards forming a federation: maybe you made the same mistake? You can add on that extra section later when you have enough to expand and get another federation token.

From the official GP rules book on PG 14

You cannot form a federation by connecting more planets
and satellites than are needed to form it. In other words, if
the federation would be valid with at least one fewer planet
and one fewer satellite, you must change the federation.

I am upset because the message of BGA with this coordinates is not clear. Where is it supposed to be place (0,-3)?

I believe you can turn on coordinate display in the preferences.

It's probably the top one in the center column.

You may be making the same mistake as the OP. Try forming a federation without selecting additional structures.