 Mercury
is the closest planet to the sun. The Greeks know Mercury as Hermes the
god of messengers. The symbol for this planet is a stylized caduceus, the
staff entwined with serpents, often carried by the god Mercury and later a
symbol of the healing arts.
|
|
MERCURY
FACTS
|
| Equatorial
diameter: |
4,878km,
0.328
x Earth's. |
| Mass: |
0.055 x
Earth's. |
| Surface
Gravity: |
0.38 x
Earth's. |
| Distance
From the Sun: |
57.9
million km |
| Rotation
Period: |
58.46
days |
| Year
Length: |
synodic,116
days. |
| Atmosphere: |
extremely
thin, mostly hydrogen and helium. |
| Satellites: |
none. |
| Density: |
5.43 |
|
