Difference between revisions of "Earth"
(New page: '''Earth''' is the third planet from the Sun orbiting at a distance of approximately 149 million km. Earth, the third planet from the Sun (after Mercury and Venus), is the home planet of m...) |
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| − | '''Earth''' | + | [[Image:earth_with_moon.jpg|thumb|right|300px|Earth as seen from Mars]] |
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| + | '''Earth''' orbits the sun at a distance of approximately 149 million km. Earth, the third planet from the Sun after Mercury and Venus, is the home planet of mankind. | ||
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| + | ==Physical== | ||
| + | It has a natural magnetic field (which [[Mars]] has not) that protects from [[solar wind]]. Earth is seen as a [[w:Astronomy_on_Mars|bright morning star]] from Mars. | ||
| + | Earth has a mostly nitrogen atmosphere and has liquid water. The nitrogen might be the hardest element to obtain for the eventual Terraforming of Mars. | ||
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| + | ==Sociological== | ||
| + | The population on Earth is around 7 900 000 000 persons<ref>https://www.worldometers.info/world-population/</ref>, increasing exponentially. However the United Nations population projections mostly show a reduction in growth in the next few decades, peaking at about [https://population.un.org/wpp/Graphs/Probabilistic/POP/TOT/ 12 billions]. | ||
| + | The is no sociology on Mars. Yet. | ||
{{stub}} | {{stub}} | ||
| − | [[ | + | [[Category:Astronomy]] |
| + | <references /> | ||
Latest revision as of 08:10, 7 January 2022
Earth orbits the sun at a distance of approximately 149 million km. Earth, the third planet from the Sun after Mercury and Venus, is the home planet of mankind.
Physical
It has a natural magnetic field (which Mars has not) that protects from solar wind. Earth is seen as a bright morning star from Mars. Earth has a mostly nitrogen atmosphere and has liquid water. The nitrogen might be the hardest element to obtain for the eventual Terraforming of Mars.
Sociological
The population on Earth is around 7 900 000 000 persons[1], increasing exponentially. However the United Nations population projections mostly show a reduction in growth in the next few decades, peaking at about 12 billions. The is no sociology on Mars. Yet.
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