Chronosphere
From Galaxy Attack: Alien Shooter Wiki
Chronosphere acts much like an extra life. When Chronosphere becomes active, it displays a dotted purple ring around your ship like so:
When your ship is hit, instead of losing a life, your ship will slow down momentarily, and you lose the protection, but you do not lose a life.
Once Chronosphere has been used, it won't regenerate, and the icon will appear disabled.
This is a must-have Talent.