[WMarshal]

"Two things. We are finding new asteroids with large orbits which we have not seen in hundreds of years. Some have shown up this year that we did not even know existed. And secondly, there is always the combination. An asteroid can hit another object and part of that combination can form new orbits and they could hit earth. We seem to be fine as long as everything keeps its orbit and hits nothing else. The reality is that space things are hitting other space things all the time. And you cannot mathematically calculate the orbit of the pieces. You just have to wait and see the outcome."
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I disagree. Artificial intelligence is now being used to find and map the orbits of astroids and comments as we speak, chugging through the massive amounts of data from past observations and new data from space space satellites.

[poinq]

The data comes from asteroids we have seen. The reality is that there are asteroids that don’t come around for a thousand years. Those are not in our data until they pass again. So they are not in the AI. Also, the AI cannot predict when the result of a rock that hits another similarly sized rock. When things hit Jupiter they stay on Jupiter. But if something were to hit our moon or any other planets moon, and they were within 10 percent of the mass, their would likely be pieces that fly into space. Those pieces will be new to the data as well. Also the comet belt just needs some bumps to cause a horrible chain reaction that will send large rocks flying through new orbits. The data we have are from a vast number of static orbits that we have recorded over the past 200 years. Some even 500 years ago.