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 by Staff Writers Beijing (XNA) Jul 07, 2022
Chinese researchers have studied the large meteorite irons to ascertain the world's longest meteorite-strewn field in Altay, northwest China's Xinjiang Uygur Autonomous Region. China has successively discovered the meteorite irons at a weight of 28 tonnes, 23 tonnes, 18 tonnes, five tonnes and 0.43 tonnes in Altay. The massive Altay irons were found to comprise the longest known strewn field of about 430 kilometers. Researchers with the Purple Mountain Observatory of the Chinese Academy of Sciences cooperated with their counterparts from Sun Yat-sen University, Macau University of Science and Technology and the University of Arizona to develop explanations of how the meteorites were formed through methods of rock mineralogy, geochemistry and numerical simulation. Their numerical modeling shows that an asteroid weighing 280 to 3,440 tonnes is hurtled into the Earth's atmosphere at 12 to 15 kilometers per second with a shallow entry angle of about 6.5 to 7.3 degrees. The stone skipping-like process explains the forming of the asteroid trajectory, which may lead to the dissipation of energy during its extremely long-distance flight, according to a recent research article published in the journal Science Advances. The research established a dynamic model of near-earth asteroids entering the Earth's atmosphere. Source: Xinhua News Agency
Unraveling a meteorite mystery reveals solar system origin story Washington DC (SPX) Jun 29, 2022 The violent event that likely preceded our Solar System's formation holds the solution to a longstanding meteorite mystery, says new work from Carnegie's Alan Boss published in The Astrophysical Journal. The raw material from which our Solar System was constructed was dispersed when the shock wave from an exploding supernova injected material into a cloud of dust and gas, causing it to collapse in on itself. In the aftermath of this event, most of the injected matter was gravitationally drawn into ... read more
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