original: Neptune is the eighth and outermost-known planet from the Sun in the Solar System.
simplifications: Neptune is the eighth and furthest planet from the Sun in the Solar System. Neptune is the eighth planet. It is the furthest from the Sun. Neptune is the eighth planet from the Sun. Neptune is the eighth planet from the Sun. It is also the outermost known planet in the Solar System. Neptune is the eighth and outermost-known planet from the Sun. It is in the Solar System. Neptune is the eighth planet from the Sun in the Solar System. Neptune is the eight planet in the Solar System and the furthest from the Sun. Neptune is the eighth planet from the Sun in the Solar System. It is also the farthest planet from the Sun. Neptune is the 8th and furthest-known planet from the Sun in the Solar System. Neptune is the eighth and most known planet in the Solar System from the Sun.