So we all should know by now that the diffrent civs have a large structure they can build that can have rather large effects.

The TEC and Versari have Space Cannons while the Advent has a culture tower.

Well i was playing a huge random map that had 5 star systems and 9 AI players with me. After a brutal campaign to capture and secure one star system i moved my fleets to the 2nd central star system to begin assaulting it. When my ships were jumping i noticed some strange objects slowly jumping to the next star system close to my ships. At first i thought they were refinery or tradeships but when i moused over them they showed up as Versari's (Space cannon) Rounds. They were my shots from my cannons. I checked my cannons (I had 5 Constructed in various planets) and the cannons tooltip said they can only shoot at things within thier star system. I thought this ment that they could only fire at stuff in the same star as thier host planet but here were around 10 shots flying through space. I even used Ally view to watch as they bombarded the planets i was going to attack.

Also, DONT be in the starsystem when one of those things hits. I got 3 nearly simultaneous hits and it nearly destroyed 2k worth of ships and 16 capitals. But its easy as pie to conqur civs when all thier structures are taken offline by one of these for a LONG time.