1 Scientists are certain that 2002 NT7 will not hit the Earth in 2019. 2 The Earth will next be in danger 2.2 years after February 2019. 3 Scientists will use nuclear weapons to destroy dangerous asteroids. 4 We will probably try to change the position of a dangerous asteroid. 5 We know for sure that a meteor killed all the dinosaurs. Правильно и не правильно