So, I just annihilated my own planet.
I was playing a
Free-For-All on the random-large-multi system map as TEC. I was
launching an invasion of the third system, which was tiny and largely
uninhabited. A Vasari opponent that had been giving me trouble had set
up colonies in the system, so I ordered my battery of Novalith Cannons
to fire on his planets in the system.
Mind you, these cannons are two star systems away.
the warheads didn't impact and I couldn't find them on the map, I
figured that the "Fires on a planet in this star system" description
was real and sent in the fleet to finish them off instead.
lo and behold, about an hour later after I'd swept the enemy colonies
out of the system and had set up in their place, I spot the Novalith
warheads entering the system. With a few choice utterances on my part,
I watch as no less than five warheads proceeded to wipe out the entire
colonies on three planets.
Let this be a lesson. Don't fire your superweapons across stars.