0 Members and 1 Guest are viewing this topic.
Neilp, despite the observations by ukmicky and another someone, you may rest assured that this was a very large impactor. Notice, however, in your illustration, that the basin has subsequently been peppered by many more smaller impactors. That demonstrates that the big impact was old, poccuring early in the moon's history. Very likely that was early during the heavy impact phase that ended baout 3.9 billion years ago. At this time the inner solar system was a dangerous place, with unsettled orbits and many planetesimals still whirling around, left over from the original accretion event.
Thats scary does one think it might happen again... and if it did would there be any chance it would remain in tack or would another shot like that just be minimally damaging?
Yes it had to be a large scale impact - the kinetic energy needed for that is larger than any (known) event on earth.