April 13-14, 2013
Kirill Benediktov writer and member of the editorial board of the website Terra America talks about the asteroid-comet danger and planetary defense.
Some quotes out of his speech:
Total number of not yet discovered objects with a diameter of greater than 1 kilometer; Russian scientists estimate that there are about 40 undiscovered, or 20% of the total undiscovered potential very dangerous large space bodies.
The total number of potentially life threatening objects to the Earth is 200,000 – 300,000 and only 2% have been identified by astronomers so far.
The most projects in space defense are passive. The only case of intervention on a space object was the deep impact experiment of bombarding nuclear on the Temple One comet.
Using ballistic missiles with a 1,5 tons payload to a danger approaching asteroid would be enough to destroy an asteroid up to several hundreds of meters in diameter.
Please listen to the interesting speech of Kirill Benediktov: