Attacking

Attacking a planet takes missles. To do it go to your planets then click on the missle button under the planet you wish to attack. Then enter how many missiles you want to use. Each normal missle does 1-100 damage each. Once the planet reaches 0 health all the machines on it are destroyed and the planet is yours. The victor also gets half of all resources on the planet. To make your planet harder to destroy build defence stations on it. Each defence station gives your planet 1000 health and it heals 1 point faster per minute. Level 2 defence stations give 10000 health and heal 10 per minute. It will take at least twenty missiles to take over a planet since it starts with one thousand health.

Calculating Max Health of a Planet
The maximum health of a planet equals (1000+number_of_machines+(1000*number_of_level_1_defence_stations)+(10000*number_of_level_2_defence_stations)).

A planet heals at a rate of (1+number_of_level_1_defence_stations+10*number_of_level_2_defence_stations) per minute.