• Thumbnail for Earth section paths
    Earth section paths are plane curves defined by the intersection of an earth ellipsoid and a plane (ellipsoid plane sections). Common examples include...
    33 KB (6,432 words) - 12:36, 30 October 2023
  • Thumbnail for Great ellipse
    route for marine navigation. The great ellipse is special case of an earth section path. Assume that the spheroid, an ellipsoid of revolution, has an equatorial...
    9 KB (1,353 words) - 18:10, 2 August 2023
  • Thumbnail for Geodesics on an ellipsoid
    1980); geodesic flow on a surface (Berger 2010, Chap. 12). Earth section paths Figure of the Earth Geographical distance Great-circle navigation Great ellipse...
    73 KB (8,411 words) - 10:38, 8 May 2024
  • Thumbnail for Sun path
    Sun path, sometimes also called day arc, refers to the daily and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates...
    16 KB (2,376 words) - 02:45, 16 April 2024
  • An earthing system (UK and IEC) or grounding system (US) connects specific parts of an electric power system with the ground, typically the Earth's conductive...
    42 KB (5,558 words) - 16:23, 7 May 2024
  • Thumbnail for Earth's rotation
    Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space...
    43 KB (4,891 words) - 19:00, 5 May 2024
  • Thumbnail for Ground (electricity)
    engineering, ground or earth may be a reference point in an electrical circuit from which voltages are measured, a common return path for electric current...
    40 KB (5,244 words) - 20:51, 13 May 2024
  • representations, see the horizontal position representations page. Earth section paths Horizontal position representation Latitude Longitude Universal Transverse...
    8 KB (1,099 words) - 07:22, 26 February 2023
  • Thumbnail for Flat Earth
    Earth is an archaic and scientifically disproven conception of the Earth's shape as a plane or disk. Many ancient cultures subscribed to a flat-Earth...
    76 KB (8,804 words) - 07:33, 6 May 2024
  • The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about 10 km (6.2 mi) under the oceans...
    24 KB (2,930 words) - 20:40, 20 February 2024
  • signal radiated by a transmitter may also travel along many and different paths to a receiver simultaneously; this effect is called multipath. Multipath...
    10 KB (1,469 words) - 07:29, 18 January 2024
  • Thumbnail for Hollow Earth
    The Hollow Earth is a concept proposing that the planet Earth is entirely hollow or contains a substantial interior space. Notably suggested by Edmond...
    39 KB (5,010 words) - 13:46, 4 May 2024
  • Thumbnail for Ecliptic
    coordinate system. The ecliptic is the apparent path of the Sun throughout the course of a year. Because Earth takes one year to orbit the Sun, the apparent...
    27 KB (2,660 words) - 22:40, 15 April 2024
  • After Earth is a 2013 American post-apocalyptic action film co-produced and directed by M. Night Shyamalan, who co-wrote the script with Gary Whitta....
    71 KB (7,700 words) - 03:34, 7 May 2024
  • Thumbnail for Atmosphere of Earth
    The atmosphere of Earth is the layer of gases, known collectively as air, retained by Earth's gravity that surrounds the planet and forms its planetary...
    63 KB (6,513 words) - 00:37, 4 May 2024
  • Thumbnail for Orbit of the Moon
    The properties of the orbit described in this section are approximations. The Moon's orbit around Earth has many variations (perturbations) due to the...
    37 KB (4,652 words) - 18:08, 16 April 2024
  • Spirituality (redirect from Spiritual paths)
    paths of spirituality are also known in Hinduism outside India, such as in Balinese Hinduism, where it is called Chatur Marga (literally: four paths)...
    101 KB (10,885 words) - 17:57, 8 May 2024
  • Thumbnail for Single-wire earth return
    electrical grid to remote areas at lowest cost. The earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second...
    24 KB (2,926 words) - 16:44, 7 May 2024
  • The Day the Earth Stood Still is a 2008 American science fiction film serving as remake of the 1951 film of the same name (which itself was based on the...
    50 KB (5,404 words) - 05:59, 2 April 2024
  • Thumbnail for Precession
    body's rotational axis or orbital path. Precession of the equinoxes, perihelion precession, changes in the tilt of Earth's axis to its orbit, and the eccentricity...
    21 KB (2,683 words) - 09:06, 6 April 2024
  • Thumbnail for Snowball Earth
    The Snowball Earth is a geohistorical hypothesis that proposes during one or more of Earth's icehouse climates, the planet's surface became entirely or...
    100 KB (12,047 words) - 00:05, 8 March 2024
  • Thumbnail for Pressure-temperature-time path
    paths can generally be classified into two types: clockwise P-T-t paths and anticlockwise P-T-t paths. Metamorphic rocks with clockwise P-T-t paths are...
    64 KB (6,779 words) - 15:24, 6 January 2024
  • Thumbnail for Geocentric model
    whether the Sun or the Earth are chosen arbitrarily as the center of the coordinate system describing the Solar System, the paths of the planets form (roughly)...
    75 KB (8,814 words) - 19:23, 7 May 2024
  • The roughly spherical shape of Earth can be empirically evidenced by many different types of observation, ranging from ground level, flight, or orbit...
    46 KB (6,278 words) - 08:37, 9 May 2024
  • Thumbnail for Earth-leakage circuit breaker
    disadvantages which include: A wire break in the fault to load section, or in the earth to ground section, will disable operation of the ELCB. Requirement of an...
    12 KB (1,771 words) - 08:22, 6 May 2024
  • Thumbnail for Ground track
    Ground track (redirect from Ground path)
    surface of the Earth (or whatever body the satellite is orbiting). A satellite ground track may be thought of as a path along the Earth's surface that traces...
    14 KB (1,964 words) - 16:04, 15 April 2024
  • Thumbnail for Counter-Earth
    The Counter-Earth is a hypothetical body of the Solar System that orbits on the other side of the Solar System from Earth. A Counter-Earth or Antichthon...
    19 KB (2,068 words) - 18:58, 3 May 2024
  • Thumbnail for Poincaré map
    the Earth at perihelion is a Poincaré map.[citation needed] It was used by Michel Hénon to study the motion of stars in a galaxy, because the path of a...
    8 KB (1,256 words) - 03:10, 18 April 2024
  • Thumbnail for Escape velocity
    required to escape the Earth's gravitational field is GMm / r, a function of the object's mass (where r is radius of the Earth, nominally 6,371 kilometres...
    27 KB (3,642 words) - 22:08, 24 March 2024
  • Thumbnail for Earth trojan
    An Earth trojan is an asteroid that orbits the Sun in the vicinity of the Earth–Sun Lagrangian points L4 (leading 60°) or L5 (trailing 60°), thus having...
    11 KB (1,187 words) - 19:40, 26 February 2024