Thoughts of the Global Financial Crisis & Climate Change not bringing you down?
Feeling rather guilty because there are still some days when you wake up smiling?
The answer is a mouse click away!
The US Government space agency NASA has gone all Flash Gordon over at Asteroid Watch:
"Nuclear explosions and spacecraft impacts are two of the more relatively mature options for deflecting Earth-threatening objects and they have been studied in some detail (for example, see Ref. 1). Another option has been suggested for the small subset of asteroids that might also pass close to the Earth a few years prior to the predicted Earth impact. For these unique cases, the pre-impact close encounter affects the asteroid's motion so strongly that a relatively tiny change in its velocity prior to the close approach will be multiplied several fold during the flyby, thus allowing the asteroid to miss the Earth on the next pass. In these relatively infrequent cases, even the very modest gravitational attraction between the asteroid and a nearby "micro-thrusting" spacecraft (nicknamed a "gravity tractor") could provide enough of a change in the asteroid's velocity that an Earth collision could be avoided (see Ref. 2). Successful mitigation requires that a threatening asteroid must be discovered and physically characterized soon enough to allow the appropriate response; the current NASA Near-Earth Object Observations program is operated with this in mind. But, since the number of near-Earth asteroids increases as their sizes decrease, we are most likely to be hit by the relatively small objects that are most difficult to find ahead of time. As a result, consideration must also be given to the notification and evacuation of those regions on Earth that would be affected by the imminent collision of a small, recently-discovered impactor. However, if the object could be found far enough ahead of time and our space technology used to deflect it from the Earth threatening trajectory, it would be a tremendous demonstration of our space-faring capabilities!"
Yup! Always knew that a hot rock banging on the noggin was a
Feeling rather guilty because there are still some days when you wake up smiling?
The answer is a mouse click away!
The US Government space agency NASA has gone all Flash Gordon over at Asteroid Watch:
"Nuclear explosions and spacecraft impacts are two of the more relatively mature options for deflecting Earth-threatening objects and they have been studied in some detail (for example, see Ref. 1). Another option has been suggested for the small subset of asteroids that might also pass close to the Earth a few years prior to the predicted Earth impact. For these unique cases, the pre-impact close encounter affects the asteroid's motion so strongly that a relatively tiny change in its velocity prior to the close approach will be multiplied several fold during the flyby, thus allowing the asteroid to miss the Earth on the next pass. In these relatively infrequent cases, even the very modest gravitational attraction between the asteroid and a nearby "micro-thrusting" spacecraft (nicknamed a "gravity tractor") could provide enough of a change in the asteroid's velocity that an Earth collision could be avoided (see Ref. 2). Successful mitigation requires that a threatening asteroid must be discovered and physically characterized soon enough to allow the appropriate response; the current NASA Near-Earth Object Observations program is operated with this in mind. But, since the number of near-Earth asteroids increases as their sizes decrease, we are most likely to be hit by the relatively small objects that are most difficult to find ahead of time. As a result, consideration must also be given to the notification and evacuation of those regions on Earth that would be affected by the imminent collision of a small, recently-discovered impactor. However, if the object could be found far enough ahead of time and our space technology used to deflect it from the Earth threatening trajectory, it would be a tremendous demonstration of our space-faring capabilities!"
Yup! Always knew that a hot rock banging on the noggin was a
B-I-G threat to my peace of mind 'n' life and limb.
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