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  2. Earth's inner core - Wikipedia

    en.wikipedia.org/wiki/Earth's_inner_core

    the Earth's mass, its gravitational field, and its angular inertia. These are all affected by the density and dimensions of the inner layers. [20] the natural oscillation frequencies and modes of the whole Earth oscillations, when large earthquakes make the planet "ring" like a bell. These oscillations also depend strongly on the inner layers ...

  3. Geographical centre of Earth - Wikipedia

    en.wikipedia.org/wiki/Geographical_centre_of_Earth

    Shift of the world's economic center of gravity since 1980 and projected until 2050 [7] Various definitions of geographical centres exists. The definitions used by the references in this article refer to calculations within the 2 dimensions of a surface, mainly as the surface of Earth is the domain of human cultural existence.

  4. Internal structure of Earth - Wikipedia

    en.wikipedia.org/wiki/Internal_structure_of_Earth

    The transition between the inner core and outer core is located approximately 5,150 km (3,200 mi) beneath Earth's surface. Earth's inner core is the innermost geologic layer of the planet Earth . It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 19% of Earth's radius [0.7% of volume] or 70% of the Moon 's radius.

  5. Scientists Drilled So Deep Into the Center of the Earth, They ...

    www.aol.com/scientists-drilled-deep-center-earth...

    Separating the planet’s rocky crust and the molten outer core, the mantle makes up 70 percent of the Earth’s mass and 84 percent of its volume. But despite its outsized influence on the planet ...

  6. Geographical centre - Wikipedia

    en.wikipedia.org/wiki/Geographical_centre

    In geography, the centroid of the two-dimensional shape of a region of the Earth's surface (projected radially to sea level or onto a geoid surface) is known as its geographic centre or geographical centre or (less commonly) gravitational centre.

  7. Pyramidal peak - Wikipedia

    en.wikipedia.org/wiki/Pyramidal_peak

    The peak of a glacial horn will often outlast the arêtes on its flanks. [1] As the rock around it erodes, the horn gains in prominence. Eventually, a glacial horn will have near vertical faces on all sides. [citation needed] In the Alps, "horn" is also the name of very exposed peaks with slope inclinations of 45-60° (e.g. Kitzbüheler Horn).

  8. How long it really takes to fall through the Earth - AOL

    www.aol.com/news/long-really-takes-fall-earth...

    The original calculations assumed that the Earth has the same density throughout - and the gravitational force changes as you approach the center, much like the weight of a spring that bounces up ...

  9. Land and water hemispheres - Wikipedia

    en.wikipedia.org/wiki/Land_and_water_hemispheres

    The centre of the water hemisphere is the antipode of the centre of the land hemisphere, and is therefore located at (near New Zealand's Bounty Islands in the Pacific Ocean An alternative assignment determines the centre of the land hemisphere to be at 47°24′42″N 2°37′15″W  /  47.411667°N 2.620833°W  / 47.411667; -2.620833 ...