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  2. Earth's circumference - Wikipedia

    en.wikipedia.org/wiki/Earth's_circumference

    Measured around the equator, it is 40,075.017 km (24,901.461 mi). Measured passing through the poles, the circumference is 40,007.863 km (24,859.734 mi). [1] Measurement of Earth's circumference has been important to navigation since ancient times. The first known scientific measurement and calculation was done by Eratosthenes, by comparing ...

  3. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.

  4. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    Currently most of the objects of mass between 10 9 kg to 10 12 kg (less than 1000 teragrams (Tg)) listed here are near-Earth asteroids (NEAs). The Aten asteroid 1994 WR12 has less mass than the Great Pyramid of Giza, 5.9 × 10 9 kg. For more about very small objects in the Solar System, see meteoroid, micrometeoroid, cosmic dust, and ...

  5. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    The Solar System, with sizes of the Sun and planets to scale. The terrestrial planets are on the right, the gas and ice giants are on the left. The Sun has eight known planets orbiting it. This includes four terrestrial planets (Mercury, Venus, Earth, and Mars), two gas giants (Jupiter and Saturn), and two ice giants (Uranus and Neptune).

  6. Expanding Earth - Wikipedia

    en.wikipedia.org/wiki/Expanding_Earth

    The expanding Earth or growing Earth was a hypothesis attempting to explain the position and relative movement of continents by increase in the volume of Earth. With the recognition of plate tectonics in 20th century, the idea has been abandoned.

  7. List of planet types - Wikipedia

    en.wikipedia.org/wiki/List_of_planet_types

    List of planet types. From top to bottom: Mercury, Venus without its atmosphere, Earth and the Moon, Mars, Jupiter, Saturn, Uranus, and Neptune in false colour (not to scale) The following is a list of planet types by their mass, orbit, physical and chemical composition, or by another classification. The IAU defines that a planet in the Solar ...

  8. Earth radius - Wikipedia

    en.wikipedia.org/wiki/Earth_radius

    The equatorial radius is often used to compare Earth with other planets. The Earth's polar radius b, or semi-minor axis: 11 is the distance from its center to the North and South Poles, and equals 6,356.7523 km (3,949.9028 mi). Location-dependent radii Three different radii as a function of Earth's latitude.

  9. Orcus (dwarf planet) - Wikipedia

    en.wikipedia.org/wiki/Orcus_(dwarf_planet)

    Orcus ( minor-planet designation: 90482 Orcus) is a dwarf planet located in the Kuiper belt, with one large moon, Vanth. [7] It has an estimated diameter of 870 to 960 km (540 to 600 mi), comparable to the Inner Solar System dwarf planet Ceres. The surface of Orcus is relatively bright with albedo reaching 23 percent, neutral in color, and rich ...

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