99942 Apophis: Will Apophis Hit Earth? - World Geographic Channel
Автор: World Geographic Channel
Загружено: 2017-12-18
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99942 Apophis: Will Apophis Hit Earth?- World Geographic Channel
99942 Apophis (/əˈpɒfɪs/, previously known by its provisional designation 2004 MN4) is a near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a probability of up to 2.7% that it would hit Earth on April 13, 2029. Additional observations provided improved predictions that eliminated the possibility of an impact on Earth or the Moon in 2029. However, until 2006, a possibility remained that during the 2029 close encounter with Earth, Apophis would pass through a gravitational keyhole, a small region no more than about 0.5 mile wide, or 0.8km[8][9] that would set up a future impact exactly seven years later on April 13, 2036.
Read More: https://en.wikipedia.org/wiki/99942_A...
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