# Question #5362e

Oct 16, 2016

See explanation.

#### Explanation:

During 1845-'46, Urban Le Verrier insisted through his mathematical

calculations that there ought to be a solar planet orbiting Sun,

beyond Uranus that as discovered by William Herschel in 1781.

The small eccentricity of the elliptic but nearly circular orbitis 0 -0112.

The orbit period is nearly 164.79 Earth years.

Blue-hued, it is dark, due to lesser insolation.

Atmosphere comprises mostly nitrogen.

Without rigid surface, the temperature therein ls less than

$- {200}^{o} C$.

Understandably, day/night spin is differential, with equator day +

night = 15 h 57 m 59 s..

Equatorial size is 3.88 X Earth's.

Moons 13, 5 of which were discovered in this century only.

The three icy ring systems are Galle, Verrier and Adams..

For more data, see NASA Planetary facts data.