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 Date: 2010-01-27 16:31:58Planetary science Asteroids Asteroid-impact avoidance Earth Near-Earth object Astronomical surveys Impact event Asteroid Spaceguard Astronomy Planetary defense Space |
| First Page | Document Content | |
|---|---|---|
Date: 2010-01-27 16:31:58Planetary science Asteroids Asteroid-impact avoidance Earth Near-Earth object Astronomical surveys Impact event Asteroid Spaceguard Astronomy Planetary defense Space |
