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18.95 ± 0.15 [10] 99942 Apophis ( provisional designation 2004 MN4) is a near-Earth asteroid and a potentially hazardous object with a diameter of 370 metres (1,210 feet) [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability up to 2.7% that it would hit Earth on April 13, 2029.
Found date. 2000. TKW. 1003 kg. Related media on Wikimedia Commons. The Fukang meteorite is a meteorite that was found in the mountains near Fukang, China in 2000. It is a pallasite —a type of stony–iron meteorite with olivine crystals. It is estimated to be 4.5 billion years old.
Meteorite weathering is the terrestrial alteration of a meteorite. Most meteorites date from the oldest times in the Solar System and are by far the oldest material available on our planet. Despite their age, they are vulnerable to the terrestrial environment. Water, chlorine and oxygen attack meteorites as soon as they reach the ground.
The Decorah crater has been conjectured as being part of the Ordovician meteor event. [346] [ better source needed ] Several twin impacts have been proposed, such as the Rubielos de la Cérida and Azuara (30–40 Ma), [347] Cerro Jarau and Piratininga (c. 117 Ma), [73] and Warburton East and West (300–360 Ma). [348]
Meteorite. The 60- tonne, 2.7 m-long (8.9 ft) Hoba meteorite in Namibia is the largest known intact meteorite. [1] A meteorite is a rock that originated in outer space and has fallen to the surface of a planet or moon. When the original object enters the atmosphere, various factors such as friction, pressure, and chemical interactions with the ...
Meteorite shock stage is a measure of the degree of fracturing of the matrix of a common chondrite meteorite. [1] Impacts on the parent body of a meteoroid can produce very large pressures. These pressures heat, melt and deform the rocks. This is called shock metamorphism. Meteorites are often given a rating from 1 to 6 showing the level of ...
Pallasite. A slice of the Esquel pallasite, clearly showing the large olivine crystals suspended in the metal matrix. The pallasites are a class of stony–iron meteorite. They are relatively rare, and can be distinguished by the presence of large olivine crystal inclusions in the ferro-nickel matrix.
Total energy released by the Chelyabinsk meteor. 6×10 14 J: Energy released by an average hurricane in 1 second: 10 15: peta-(PJ) > 10 15 J: Energy released by a severe thunderstorm: 1×10 15 J: Yearly electricity consumption in Greenland as of 2008: 4.2×10 15 J: Energy released by explosion of 1 megaton of TNT: 10 16 1×10 16 J