Temporal Space Yard
Temporal Space Yards produce much more quickly than normal spaceyards. But, you cannot upgrade a normal Space Yard to a Temporal Space Yard-- you have to scrap your Space Yard first. (Quikngruvn). Combined with other bonuses (Hardy Industrialists, construction characteristic, population bonus), planets with a TSY can have extremely high construction rates. TSY's have same repair rates as normal spaceyards. Building a TSY takes roughly twice as long as building a normal SY.
You can only build a temporal Space Yard if your race has access to the Temporal tech tree.