Sun

The Sun is the antagonist of Icarus. Everything that the player does to win the game will be to combat the sun's growth or escape from the sun.

In the main game, the sun's size starts at 32 units. Every frame, the sun expands its size by 0.004 units. This means that every second, which is 60 frames in the game, the sun expands its size by 0.24 units, in the main game. When an Interstellar colony ship is created, the new solar system's sun will not expand.


 * Planets closer than 1.5 times the sun's radius experience extreme temperatures, unless they have solar reflectors, then they experience increased temperatures. In 1.0.6.1, this was a 16 unit zone, instead of a 1.5 multiplier
 * Planets further than 1.5 times the sun's radius but closer than 3 times the sun's radius experience increased temperatures, unless they have solar reflectors, then they experience normal temperatures.
 * Planets further than 3 times the sun's radius but closer than 6 times the sun's radius experience normal temperatures, and population proliferates the fastest.
 * Planets further than 6 times the sun's radius but closer than 12 times the sun's radius experience cold temperatures, and population growth is slowed, unless the planet is terraformed, then it will experience normal temperatures
 * Planets further than 12 times the sun's radius experience freezing temperatures, unless the planet is terraformed, then it will experience cold temperatures.

Fusion inhibitors make the sun grow smaller for a bit. If the production time for a fusion inhibitor is under 31, the next change in size of the sun is negative.

Trivia

 * Planets that do not follow the states above, that is they are exactly, for example, 1.5 times the radius away from the center will be in different states depending on the zoom of the player.