Asteroid Field

• A player's ships may not move through an Asteroid Field unless that player has gained the Anti-mass Deflector (Red) technology.
• If a player does have the required technology, he may move his ships through an Asteroid Field, but it is never possible, by any means, for a ship to end its movement in an
  Asteroid Field.
• An Asteroid Field may never be activated.

Nebula

• Ships can never move through a Nebula (but ships can move into a Nebula via normal activation)
• A Fleet defending a Nebula receives +1 to its combat rolls during any Space Battle here
• A ship leaving a Nebula always has its movement reduced to 1 (regardless of technology modifiers and Action Cards).

Ion Storm

• Ships may never move through an Ion Storm (however, ships can move into an Ion Storm via normal activation).
• PDS Cannons may never be fired at ships inside an Ion Storm.
• Fighters do not roll any dice during combat inside an Ion Storm. However, Fighters may still be taken as casualties.