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Murchison meteorite : ウィキペディア英語版 | Murchison meteorite
The Murchison meteorite is named after Murchison, Victoria, in Australia. It is one of the most studied meteorites due to its large mass (>100 kg), the fact that it was an observed fall, and that it belongs to a group of meteorites rich in organic compounds. ==History== On 28 September 1969 at about 10:58 local time, near the town of Murchison, Victoria, in Australia, a bright fireball was observed to separate into three fragments before disappearing,〔 leaving a cloud of smoke. About 30 seconds later, a tremor was heard. Many fragments were found over an area larger than 13 km², with individual mass up to 7 kg; one, weighing 680 g, broke through a roof and fell in hay.〔 The total collected mass exceeds 100 kg.
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