Planetary Defense - Legacy for a Certain Future

by Air War College

The threat to Earth due to the impact of an Earth-crossing asteroid or comet is not new, but scientists have only recently recognized it as a continuing threat. The past ten years reveal several frightening near misses, and "hits" by bodies too small to survive long enough in the atmosphere to cause damage. The hazard created when an object strikes Earth varies greatly, from a minimum of no damage due to the object's destruction in the atmosphere...

• Format: Paperback
• Language: English
• ISBN: 1499778090
• ISBN13: 9781499778090
• Release Date: June 2014
• Publisher: Createspace Independent Publishing Platform
• Length: 92 Pages
• Weight: 0.52 lbs.
• Dimensions: 0.2" x 8.5" x 11.0"