MERCURY
· Diameter: 4,878km
· Average Density: 5.4(water=1)
· Surface gravity :0.38(earth:1)
· Surface temperature: -170 to +350oC
· Atmosphere: traces of helium, CO2, xenon etc.
·
Volume:
6.083 × 1010
km
0.056
Earths
· Mean distance from Sun :
58 million km
· Speed in orbit : 47.9km/s
· 1 year : 88 days
· Mercury is named by Romans after the winged-foot
messengers of the gods.
· Long nights in mercury last for about 59 earth days.
· At its coldest the surface of mercury is seven times colder than a deep freeze.
