Planet Neptune Planet Neptune is that the eighth planet from the Sun and therefore the last notable planet. though it's the third-largest planet by mass, it's solely the fourth largest by diameter. attributable to its blue coloring, Neptune was named when the Roman god of the ocean. Neptune is that the sole planet in our system not visible to the oculus. In 2011, Neptune completed its full 165-year orbit since its discovery in 1846. The ice large Neptune was the primary planet to be discovered by mathematical calculations. victimization the predictions of Urbin autoimmune disorder Verrier, Johann Galle discovered the earth in 1846. Size and distance of the earth Neptune Planet Neptune is up to now from the sun that midday on the blue planet can seem to be an uninteresting twilight. the sunshine we tend to see here on our home planet is regarding 900 times brighter than the daylight on Neptune. Neptune incorporates a radius of twenty-four,622 klicks and is regarding fourfold the sca