d. Have there been any historic examples of a collision with an NEO? If so, when
ID: 153220 • Letter: D
Question
d. Have there been any historic examples of a collision with an NEO? If so, when and where? (Note that historic in this context refers to human recorded history) (1 points)
e. Is there any evidence that a large NEO collided with the Earth at any time in its history? If so, when and where was this impact event, and what were the consequences for the inhabitants of the planet at the time? (2 points)
f. In June of 2012, Asteroid 2012 LZ1 passed fairly close to the Earth (in astronomical terms). Although it is was not a threat to Earth, after it passed, two serious issues were raised concerning the asteroid's discovery and size. Use the search engine of your choice to find out about these issues (note that it is important to look for articles published after the asteroid passed). What are these two serious issues? (2 points)
Explanation / Answer
d. Have there been any historic examples of a collision with an NEO? If so, when and where? (Note that historic in this context refers to human recorded history) (1 points)
ANSWER:
YES. There have been a few impacts with NEOs ( near earth object ) is recorded in human history. these include the Tunguska impact in Russia Siberia ( year = 1908 ) , the Sikhote Alin iron meteorite in Western Russia (year= 1947), the Peekskill meteorite n 1992, the Carancas meteorite impact in the Peruvian Andes and the Airburst over Chelyabinsk Russia ( year = 2013) . there are many other also. but those above examples are the recorded incidents in recent history.
e. Is there any evidence that a large NEO collided with the Earth at any time in its history? If so, when and where was this impact event, and what were the consequences for the inhabitants of the planet at the time? (2 points)
ANSWER:
YES.
There is evidence that a large NEO of about 15 km impacted the Earth 65 Ma (million years) ago and wiped out the dinosaurs. This has been connected to the Chicxulub crater on the Yucatan peninsula area.
f. In June of 2012, Asteroid 2012 LZ1 passed fairly close to the Earth (in astronomical terms). Although it is was not a threat to Earth, after it passed, two serious issues were raised concerning the asteroid's discovery and size. Use the search engine of your choice to find out about these issues (note that it is important to look for articles published after the asteroid passed). What are these two serious issues? (2 points)
ANSWER:
The two serious issues which have been raised concerning Asteroid 2012 LZ1 were its late detection, it was discovered only 4 days before it would pass by the earth and the size which was not predicted properly.
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