How big is Neptune? - space.com. Space.com. 2015 [2016-04-04]. (原始内容存档于2016-04-07). The 2nd-largest planet is Saturn, 3rd-largest is Uranus, 4th-largest is Neptune, while 2nd-most massive planet is Saturn, 3rd-most massive is Neptune, but 4th-most massive is Uranus.
How big is Neptune? - space.com. Space.com. 2015 [2016-04-04]. (原始内容存档于2016-04-07). The 2nd-largest planet is Saturn, 3rd-largest is Uranus, 4th-largest is Neptune, while 2nd-most massive planet is Saturn, 3rd-most massive is Neptune, but 4th-most massive is Uranus.