Uranus vs. Neptune vs. Mercury

Discovery

Discovered By

n/a

n/a

Unknown

Discovery Site

n/a

n/a

Unknown

Discovered At

n/a

n/a

Prehistoric

Physical Characteristics

Mean Diameter

Volume

Mass

Mean Density

Surface Gravity

Mean Temperature

Atmosphere Characteristics

Surface Pressure

Composition

83% H, 15% He

80% H, 19% He

42% O, 29% Na, 22% H

Surroundings

Natural Satellites

Ring System

No

Global Magnetic Field

Yes

Orbital Characteristics

Median Orbital Radius

Apoapsis / Aphelion

Periapsis / Perihelion

Sideral Orbital Period

Sideral Rotation Period