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  2. Atmosphere of Earth - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Earth

    The troposphere is the lowest layer of Earth's atmosphere. It extends from Earth's surface to an average height of about 12 km (7.5 mi; 39,000 ft), although this altitude varies from about 9 km (5.6 mi; 30,000 ft) at the geographic poles to 17 km (11 mi; 56,000 ft) at the Equator, [23] with some variation due

  3. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    Height of Mount Everest, the highest mountain on Earth 10 4: 10 km: 10.9 km Depth of the Challenger Deep in the Mariana Trench, the deepest-known point on Earth's surface 27 km Circumference of the Large Hadron Collider, as of May 2010 the largest and highest energy particle accelerator: 42.195 km Length of a marathon: 10 5: 100 km: 100 km

  4. International Space Station - Wikipedia

    en.wikipedia.org/wiki/International_Space_Station

    The ISS maintains an orbit with an average altitude of 400 kilometres (250 mi) [12] and circles the Earth in roughly 93 minutes, completing 15.5 orbits per day. [13] The ISS programme combines two prior plans to construct crewed Earth-orbiting stations: Space Station Freedom planned by the United States, and the Mir-2 station, planned by the ...

  5. Precipitation - Wikipedia

    en.wikipedia.org/wiki/Precipitation

    Raindrops have sizes ranging from 5.1 to 20 millimetres (0.20 to 0.79 in) mean diameter, above which they tend to break up. Smaller drops are called cloud droplets, and their shape is spherical. As a raindrop increases in size, its shape becomes more oblate , with its largest cross-section facing the oncoming airflow.

  6. Antarctica - Wikipedia

    en.wikipedia.org/wiki/Antarctica

    Antarctica is the coldest, windiest, and driest of Earth's continents. [1] Near the coast, the temperature can exceed 10 °C in summer and fall to below −40 °C in winter. Over the elevated inland, it can rise to about −30 °C in summer but fall below −80 °C in winter.

  7. List of countries by life expectancy - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_life...

    Only countries with populations over 50,000 are listed. Due to this criterion, the table does not include such countries as Monaco (LE 86.37 years, population 39,000), San Marino (LE 85.71 years, population 34,000), and Saint Barthélemy (LE 84.29 years, population 11,000). The values are rounded, all calculations were done on raw data.

  8. Sukhoi Su-27 - Wikipedia

    en.wikipedia.org/wiki/Sukhoi_Su-27

    The Sukhoi Su-27 (Russian: Сухой Су-27; NATO reporting name: Flanker) is a Soviet-origin twin-engine supersonic supermaneuverable fighter aircraft designed by Sukhoi.It was intended as a direct competitor for the large US fourth-generation jet fighters such as the Grumman F-14 Tomcat and McDonnell Douglas F-15 Eagle, with 3,530-kilometre (1,910 nmi) range, heavy aircraft ordnance ...

  9. World population - Wikipedia

    en.wikipedia.org/wiki/World_population

    Six of the Earth's seven continents are permanently inhabited on a large scale. Asia is the most populous continent, with its 4.64 billion inhabitants accounting for 60% of the world population. Asia is the most populous continent, with its 4.64 billion inhabitants accounting for 60% of the world population.