Ⅱ. Main Point 1: What is a comet?
A. The definition of comets
B. The components of comets
Ⅲ. Main point 2: There were three hypothesis of collision between the Earth and a comet or asteroid
A. The cometary hypothesis
B. The nebular hypothesis
C. The catastrophic hypothesis
Ⅳ. Main point 3: Deep impact is the eighth mission in NASA’s discovery program.
A. Comet Tempel
B. Deep Impact Project
C. Technical implementation
Ⅴ. Main point 4: What result will we get from “Deep Impact”?
In 1999, most of global people had unrest about collapse of the Earth, which based on explanatory notes of Nostradamus. I don’t remember exactly what it was, but I think that he said “November, 1999, the Earth will have a great disaster by colliding with other solar planet.” And I heard that the collision between Earth and Asteroids will happen in 20 years from the news. Even though it was a mistake of NASA, I was extremely afraid and curious of this kind of collision. Moreover, in 1999, some movies related to this explanatory notes came up and were popular; such as “Armageddon” and “Deep impact”; raised tensions.