I keep seeing people commenting about how asteroids cannot be placed within range 1 of eachother, and I cannot find this ruling anywhere. I have scoured the updated rules and FAQ and found nothing about basic play. The only reference to not being able to place them within range 1 of eachother is in one of the missions in the base set. (I am not referring to any tournament rules, just standard play).
Obstacle rules from the updated general rules:
"Starting with the Imperial player, each player takes a turn placing one obstacle inside the play area. Obstacles cannot be placed within Range 1–2 of any edge of the play area. After placing all of the obstacles, the Rebel player chooses which edge of the play area is his. The Imperial player’s edge is on the opposite side of the play area.Players may agree to increase the size of their play area to account for these extra elements."