NEO Near
Near Earth Objects
The Earth's atmosphere protects us from most NEOs smaller than a modest office building (40 m diameter, or impact energy of about 3 megatons). From this size up to about 1 km diameter, an impacting NEO can do tremendous damage on a local scale. Above an energy of a million megatons (diameter about 2 km), an impact will produce severe environmental damage on a global scale. The probable consequence would be an "impact winter" with loss of crops worldwide and subsequent starvation and disease. Still larger impacts can cause mass extinctions, like the one that ended the age of the dinosaurs 65 million years ago (15 km diameter and about 100 million megatons).
( NASA
Have you seen Armageddon or Deep Impact? They are movies about humans discovering an asteroid a few days before it hits earth. They are big enough to “end life as we know it”. Imagine that you are the president of the
What’s the probability that tomorrow, some astronomer (:P) at NASA finds that an unidentified asteroid is heading for Earth? I don’t think you can attach a probability to that. There is just too much unknown stuff out there in space.
"There will be signs in the sun, moon and stars. On the earth, nations will be in anguish and perplexity at the roaring and tossing of the sea. Men will faint from terror, apprehensive of what is coming on the world, for the heavenly bodies will be shaken. At that time they will see the Son of Man coming in a cloud with power and great glory. When these things begin to take place, stand up and lift up your heads, because your redemption is drawing near."
Luke 21:25-28 NIV
