ISS too. Its budget is more than double that of planetary exploration. EDIT: Just the budget for getting crew and equipment to/from the ISS is roughly the same

ISS too. Its budget is more than double that of planetary exploration. EDIT: Just the budget for getting crew and equipment to/from the ISS is roughly the same as the entire planetary science program. And ISS is also a program that just buys launchers.[1] [1] http://www.nasa.gov/sites/default/files/files/NASA_FY_2016_Budget_Estimates.pdf http://www.nasa.gov/sites/default/files/files/NASA_FY_2016_B...