Asteroid Belt

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Asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets. The asteroid belt is also termed the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System such as near-Earth asteroids and trojan asteroids. About half the mass of the belt is contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. The total mass of the asteroid belt is approximately 4% that of the Moon, or 22% that of Pluto, and roughly twice that of Pluto’s moon Charon (whose diameter is 1200 km). — Wikipedia

Encyclopædia Britannica

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Planets and Dwarf Planets (Ask an Astronomer, Cornell University)
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Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • NASA's OSIRIS-REx to asteroid Bennu: 'You've got...
    on September 22, 2020 at 1:21 pm

    In an interplanetary faux pas, it appears some pieces of asteroid Vesta ended up on asteroid Bennu, according to observations from NASA's OSIRIS-REx spacecraft. The new result sheds light on the intricate orbital dance of asteroids and on the violent origin of Bennu, which is a "rubble pile" asteroid that coalesced from the fragments of a massive collision.

  • Astronomers discover a 2-km asteroid orbiting...
    on September 16, 2020 at 1:59 pm

    Astronomers have painstakingly built models of the asteroid population, and those models predict that there will be ~1 km-sized asteroids that orbit closer to the sun than Venus does. The problem is, nobody's been able to find one—until now.

  • Meteorite study calls into doubt a popular theory...
    on September 16, 2020 at 12:50 pm

    It is generally accepted that the inner region of the early solar system was subject to an intense period of meteoric bombardment referred to as the late heavy bombardment. However, researchers have found evidence that suggests this period occurred slightly earlier than thought and was less intense but also more prolonged. Such details about this period could impact theories about the early Earth and the dawn of life.

  • Study indicates sand-sized meteoroids are...
    on September 9, 2020 at 3:00 pm

    A new study published this month in JGR Planets posits that the major particle ejections off the near-Earth asteroid Bennu may be the consequence of impacts by small, sand-sized particles called meteoroids onto its surface as the object nears the Sun. The study's primary author is Southwest Research Institute scientist Dr. William Bottke, who used data from NASA's OSIRIS-REx mission.

  • First-ever mission to the Trojan asteroids passes...
    on August 28, 2020 at 6:29 pm

    NASA has approved the final development stage of the Southwest Research Institute-led Lucy mission to explore the Trojan asteroids in preparation for its October 2021 launch.