First of all some Notes before the whole explanation of the suggestion:
•This is not a defense, it`s a ship that can only be build one at a time per planet and has speed 0.
•It doesn’t favor stronger players; you simply need a grade of investigation to get it.
•Being a fleet means that it produce debris, so not all the advantages are for the defender, someone could attack it and collect all the debris created after a battle

Game presentation

Empires were suffering major attacks from more powerful empires, so engineers started to develop a new defense. However, they realized they had no more space to build a better shield dome and decided to make a large structure involving millions of ships completely covering the planet atmosphere with it and uniting all by ionic-hyperspace forces. However, they faced a new problem, the sunlight couldn’t reach the surface, so they made a great effort in terms of energy research and through a complicated set of mirrors and photovoltaic cells they were able not only to make light to penetrate the surface, but also to produce energy equivalent to a hundred solar satellites.

Costs

Metal: 3.000.000
Crystal: 3.000.000
Deuterium: 1.000.000

Requirements

Shipyard (level 11)
Shielding Technology (level 11)
Armour Technology (level 11)
Energy Technology (level 13)
Hyperspace Technology (level 9)
Ion Technology (level 11)

Techinfo

Structural Integrity 6.000.000
Shield Strength 150.000
Attack Strength 100
Speed 0
Cargo Capacity 0 units
Fuel usage (Deuterium) 0
Energy production 5.000, equivalent to a hundred solar satellites

Community Opinion

The mayor part of the community like the idea because when the game progress the two existing shield domes are not enough to protect the planets especially from Deathstars, but they are worry about that destroying this new shield dome make debris and this could attract new attacks from more powerful players and some people don’t like the idea of the energy production because they think this will allow more people to do the research Graviton Technology but the general consensus is that the idea is good and players should adapt when and where to use it

Maybe some tweaking to the techs and requirements, but this looks good.

This is not a defense, it`s a ship that can only be build one at a time per planet and has speed 0.

So, an ship that can't go to other planets ?

Yes... it's a ship without "engine"

I don't really like this idea...it sounds like another useless defense that wouldn't really stick out over having 100 extra plasma turrets.

I do not know if I am allowed to write here, but as I am the owner of the idea, I see it proper. The idea came to me 5 years ago and actually, know I do not see to much use of it. The only use of it now will be to avoid very fast raids, while you will need to have destroyers to break it. I myself have given up the idea, but it is still satisfactory to me that the community at least has the time to thing for a while about it.

Thank you.