From Outscape Wiki
This s a term to describe the total out put of all Labs and other sources (Homeworld, Colony that contains Akorokken etc) that your empire produces. Each of the Technologies in game requires a certain amount of Science power to be expended on them to unlock.
By ratioing the Technologies Science power requirement to your Science output we derive how long a given tech will take a particular empire to unlock for their own use.
See also Research and Technology