Asteroids

Asteroids

1. A

   • In 2010
     • planetary defense team
       • 90 asteroids nearby land
         • They will measure 1 km wide
         • named NEO
         • mountains size
         • no danger significant planet

2. B

   • NASA
     • record small asteroids
       • 140 meters wide or more
       • have registered about 8,000
       • 17,000 unaccounted for
     • Russia in 2013
       • 19-meter asteroid exploded
       • Chelyabinsk
       • injured 1,200 people
     • Medium asteroids
       • serious danger orbit land

3. C

   • NASA
     • Finding medium asteroids
       • Depends on money build NEOCam
         • 0.5m space telescope infrared light
       • goal in ten years
       • planetary defense would need discover defend planeta
         • against asteroids worrisome: PHA

4. D

   • potentially dangerous asteroids
     • nearby rocks pass 7.5 million km
       • Earth orbit
     • NASA
       • created map 1,400 PHA
         • none threatens in 100 years
       • track objects
         • possible impact predictions

5. Defensive Solutions

   • DART
     • redirect double asteroids
     • Try it
       • asteroid moon Didymos
         • 150 meters wide
         • orbiting mother 800 meters
       • take out orbit
         • ground telescopes pick up
   • Nuclear weapon
     • Rockets
       • Shot against asteroid
         • Deviate course
       • 8 tons
     • Asteroid near earth
       • Rockets with bombs nuclear