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The ''Tissint'' meteorite is a Martian meteorite that fell in Tata Province in the Guelmim-Es Semara region of Morocco on July 18, 2011. Tissint is only the fifth Martian meteorite that people have witnessed falling to Earth, the last time in 1962. Pieces of the meteorite are on display at several museums, including the Museum of Natural History of Vienna and the Natural History Museum in London. == History == On July 18, 2011, around 2 AM local time, a bright fireball was observed by several people in the Oued Drâa valley, east of Tata, Morocco. One observer reported that the fireball was initially yellow in color, then turned green, illuminating the entire area before it appeared to break into two pieces; two sonic booms were heard over the valley. In October 2011, nomads began to find very fresh, fusion-crusted stones in a remote area of the Oued Drâa intermittent watershed, centered about ESE of Tata and SSW of Tissint village, near the Oued El Gsaïb drainage and also near El Ga’ïdat plateau known as Hmadat Boû Rba’ine. The largest pieces were recovered in the El Ga’ïdat plateau, and the smallest ones (a few grams) were found closer to the El Aglâb mountains. One 47 g crusted stone was documented as found at 29°28.917’ N, 7°36.674’ W. ''Tissint'' was named after the town of Tissint, located away from the fall site. Up until 1990, only five meteorites had been found in Morocco, but since then, more meteorites have landed in the area. Current records show that meteorite hunters have discovered 754 at specific sites in Morocco as well as thousands of others from uncertain locations. After the increases in meteorite falls, a market for meteorites drove the emergence of a meteorite prospecting industry in northwestern Africa and Oman. The rocks have been quickly bought out of the country into collections abroad because the significant discoveries resulted in high prices for the rocks (an auction on October 14, 2012, included fragments of the Tissent meteorite). This made it difficult for researchers such as Hasnaa Chennaoui Aoudjehane, the only one who has studied the meteorite, to have access to samples for her research and leaves Morocco with few remains of the meteorites that fell there. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tissint meteorite」の詳細全文を読む スポンサード リンク
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