Mass (kg): 3.3 x 1023 Diameter (km): 4879.4 Mean density (kg/m3): 5420 Escape velocity (m/s): 4300 Average distance from Sun: 0.387 AU* (57,909,175 km) Rotation period (length of day in Earth days): 58.65 Revolution period (length of year in Earth days): 87.97 Obliquity (tilt of axis degrees): 0 Orbit inclination (degrees): 7 Orbit eccentricity (deviation […]
1. Mercury is the smallest planet in the Solar System. 2. The orbital speed of Mercury is 47.8 km/sec (29.7 miles/sec). 3. Mercury has no atmosphere and no known satellites, perhaps because of its proximity to the Sun. 4. The diameter of Planet Mercury is 4,878 km (3,031 miles). 5. The first visit to Mercury
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Texts and descriptions are fine and dandy, but to see planet Earth for what it is is another thing altogether. Enjoy these pictures of Earth.
Mass: 5.98 x 1024 Diameter (km): 12756 Mean density (kg/m3): 5520 Escape velocity (m/s): 11200 Average distance from Sun: 1 AU (149,597,890 km) Rotation period (length of day in Earth days): 1 (23.93 hours) Revolution period (length of year in Earth years): 1 Obliquity (tilt of axis degrees): 23.4 Orbit inclination (degrees): 0 Orbit eccentricity
1. The Earth is around 4.6 billion years old according to scientists. 2. The Earth is the densest planet in the Solar System. 3. The Earth’s atmosphere is composed mainly of nitrogen (78%), oxygen (21%), argon (.93%), and carbon dioxide (0.03%). 4. Earth’s atmosphere divided in 5 sections from the surface: Troposphere (0-13 km), Ozone
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