Planet Earth
symbol:
The Earth is the third planet from the Sun in the Solar System. As a planet, it took a while before it was even realised it was even a planet or it's relationship to the solar system. For the humans on it it took quite some clever thinking to realise where it was.
A realtime image from 13:30 on 22/04/2019 from himawari8 satellite
The study of Earth is also known as the Earth Sciences
Orbit basics:
- Distance from sun: between 147,098,291 and 152,098,233 km (the average is called 1 AU (astronomical unit at 1.495978707 x1011m). The difference is about 4,999,942 km or about 3.2 % of the furthest distance.
- Orbital period (it's year): 365.26 Earth days
- Moons (natural satellite):
- 1; Luna, The Moon, tidally locked orbit.
Planet basics:
- Type of planet: The original rocky/terrestrial
- Length of day: 23.934 hours
- Average radius: 6,371.00 km
- Mass: 5.9722 x 1024 kg
- Surface gravity: 1 g or 9.80665 m/s2
- Escape velocity: 11.186 km/s (40,270 km/h)
- Mean density: 5.515 g/cm3
- Surface temperature: min of−89.2 °C average of 14 °C maximum of 57.8 °C
- Atmosphere: Substantial enough
- Pressure: 1 bar or 101.325 kPa (Mean Sea Level) sea also air pressure
- Atmospheric composition:
- 78.08% nitrogen (N2) (dry air)
- 20.95% oxygen (O2)
- 0.93% argon
- 0.038% carbon dioxide
- About 1% water vapor (varies with climate)
- wide range other chemical traces, such as NOx(nitrous oxides), SO (sulphur oxides), O3 ozone (safer and essential in the ozone layer, but a health hazard at lower altitudes)