The second planet from the Sun,
Venus is more like Earth than any other planet. It is only slightly
smaller and lighter than Earth and shares some common surface features,
including mountains, volcanoes and vast flat plains. Unlike Earth, however, its intense
air pressure, incredible heat and poisonous atmosphere would make it impossible
for us to live there. Venus is the brightest object
in the night sky, after the Sun and Moon. This is because it has
thick clouds high above it that reflect the Sun's bright light. Just below these clouds in an
atmosphere of gas called carbon dioxide which traps the Sun's heat.
This is known as the greenhouse effect. It means that Venus's surface
temperatures can reach 900ºF and (unlike Mercury) it stays around
that temperature day and night. Did you know? In Earth terms,
a day on Venus is longer than a year there: a day on Venus lasts 243 Earth
days; a year lasts only 225 Earth days.
Venus Statistics
Mass (kg)
4.869e+24
Mass (Earth = 1)
.81476
Equatorial radius (km)
6,051.8
Equatorial radius (Earth = 1)
.94886
Mean density (gm/cm^3)
5.25
Mean distance from the Sun (km)
108,200,000
Mean distance from the Sun (Earth = 1)
0.7233
Rotational period (days)
-243.0187
Orbital period (days)
224.701
Mean orbital velocity (km/sec)
35.02
Orbital eccentricity
0.0068
Tilt of axis (degrees)
177.36
Orbital inclination (degrees)
3.394
Equatorial surface gravity (m/sec^2)
8.87
Equatorial escape velocity (km/sec)
10.36
Visual geometric albedo
0.65
Magnitude (Vo)
-4.4
Mean surface temperature
482°C
Atmospheric pressure (bars)
92
Atmospheric composition
Carbon dioxide Nitrogen
Trace amounts of: Sulfur dioxide, water vapor, carbon
monoxide, argon, helium, neon, hydrogen chloride, and
hydrogen fluoride.