Is there such thing? Ok so a planet can attack u but when u attack it its not there so u cant. It shows the place where it came from but when u look its not there... What is it? BUG?

Someone probably abandoned the colony they attacked you from.

i agree with sloth. there are also some other planets out there in witch have no name or ability to probe. i could only assume since they are still around it would be zorg's live server testing things. but really i have no clue i just see the around
although i don't believe he would be attacking you lol