Is there any lag before combat?

Perhaps a wishful question - my carrier will arrive at my star exactly 4 seconds after the enemy carrier will arrive. Yes, 4 SECONDS. Will I get to fight before he takes the star and gets the defender bonus?

Sounds like you are in a real time game.

Combat is determined per tick.

So you own the star. That means you are the defender with Weapons+1 defender’s bonus. All ships and carriers arriving that tick are gathered together for one combat.

So the 4 seconds difference just depends on whether the carriers arrive during the same tick ? or separately over adjacent ticks ?

Most likely there could be some kind of lag in your internet. Refresh your browser and see whether those 4 seconds go away.

Aha, I forgot about the tick counter. Thanks. Can you tell that I’m a noob?