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  2. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Earth is the third planet from the Sun and the only astronomical object known to harbor life.This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water.

  3. Earth's orbit - Wikipedia

    en.wikipedia.org/wiki/Earth's_orbit

    Earth at seasonal points in its orbit (not to scale) Earth orbit (yellow) compared to a circle (gray) Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, [1] in a counterclockwise direction as viewed from above the Northern Hemisphere.

  4. Expanding Earth - Wikipedia

    en.wikipedia.org/wiki/Expanding_Earth

    Historical Hilgenberg globes [1] Potential reconstruction of continents bordering the Atlantic (left column) and Pacific (right column) oceans as they might have appeared at different points, going back in history, using the expanding Earth hypothesis, based on reconstructions by expanding Earth proponent Neal Adams

  5. Geological history of Earth - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_Earth

    The Precambrian includes approximately 90% of geologic time. It extends from 4.6 billion years ago to the beginning of the Cambrian Period (about 539 Ma).It includes the first three of the four eons of Earth's prehistory (the Hadean, Archean and Proterozoic) and precedes the Phanerozoic eon.

  6. Valeriepieris circle - Wikipedia

    en.wikipedia.org/wiki/Valeriepieris_circle

    The original 2013 map by Ken Myers, with the interior of the circle inverted. A Valeriepieris circle [1] [2] [3] is a figure drawn on the Earth's surface such that the majority of the human population lives within its interior.

  7. Sidoarjo mud flow - Wikipedia

    en.wikipedia.org/wiki/Sidoarjo_mud_flow

    The Sidoarjo mud flow (commonly known as Lumpur Lapindo, wherein lumpur is the Indonesian word for mud; and as Lusi (Lumpur Sidoarjo)) is the result of an erupting mud volcano [1] in the subdistrict of Porong, Sidoarjo in East Java, Indonesia that has been in eruption since May 2006.

  8. Earth's rotation - Wikipedia

    en.wikipedia.org/wiki/Earth's_rotation

    Earth's rotation imaged by Deep Space Climate Observatory, showing tilt. 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.

  9. Low Earth orbit - Wikipedia

    en.wikipedia.org/wiki/Low_Earth_orbit

    A wide variety of sources [5] [6] [7] define LEO in terms of altitude.The altitude of an object in an elliptic orbit can vary significantly along the orbit. Even for circular orbits, the altitude above ground can vary by as much as 30 km (19 mi) (especially for polar orbits) due to the oblateness of Earth's spheroid figure and local topography.