Quote from: Julie Marie on May 15, 2011, 05:09:14 AM
Now just imagine this comet and Earth. Oh, that's right, we'll get front row seats on 12/21/2012! 
The whole concept of deep space impacts fascinates me, especially those that have hit Earth. Sometime, when you have a few spare hours, I'll tell you about a theory I have on a specific time and place when humans survived a 2012 like experience.
Packs her documents and manuscript away for another day... 
This comet was a small piece. It had the type of volatiles that gas out at high temperatures and was only visible when it got near the sun. The size of the coma and tail is an exaggeration of the size of the nucleus. This comet would do very little, if any, damage to the earth if it struck it.
There is a possibility of being struck by a comet or asteroid that would do damage to mankind. There are observers, myself included, around the world that look for and confirm asteroid and comet sightings. These object observations are put into a central database, their orbital elements plotted and mapped. I in return can download the latest listings that can be inputted into my planetarium program. There are about 550,000 asteroids in my database at this moment. I use that database when I find an asteroid in one series of my images. I can use that to identify that asteroid, get the solution on the position, date and time, and turn it in if the Minor Planet Center wants more data on it.
Back to the end of the Cretaceous Period when tha last biggie struck, the smartest being on Earth was probably the velociraptor. It showed that it had the family and group structure more advanced than the other dinosaurs. But they didn't have the skills to survive the volcanic Deccan Traps and the asteroid collision that followed. Our species has survived and thrived in conditions that did in the other species.
Ours is the only species on this planet that can do something about rogue asteroids and comets. We got the advanced brain which led to something called technology. We can divert these things if we have enough time to act from the detection of these. However, we can still be blindsided with these since our world wide detection system is limited by the natural observation windows. Weather, moonlight, seasons, downtime of instruments, etc. contribute to the narrowing of the observation windows. Political inertia is added to the list because of the limited funding in this area. Professional observatories like the Lincoln Lab and the Catalina Mountains Observatory find the bulk of these.
There are a lot of amateurs like myself that go out and look for and track these things down out of or own pockets. It is 108 miles round trip to the site I use, and I have to set-up my equipment and break it down again every night I go out there. The cost of gas and the maintenance of my vehicle, equipment and the property I use is all out-of-pocket.
Joelene