From Astro Wars
Your game score increases/(decreases) each Daily Update. Your population, player level and science levels are taken into account. Each increment in Population above level 20 gains a 2 point bonus and each increment in Population above level 10 gains a 1 point bonus. Each Player Level gains a 1 point bonus. For each Science level above 20 you also gain 1 bonus point.
Your score is calculated in this way: (2 x Population > 20) + (Population > 10) + Player Level + (1 x each Science level above 20)
Example: A player has 5 planets with 21,16,10,9,8 Population, 3 Player Levels, plus one Science at level 21 and one at level 22.
This would give: 1 x (2 x Population > 20) + 16 x (Population > 10) + 3 (Player Levels) + 3 x (Science levels over 20) = 24 points.