What's special about his particular "gravitational change" even if it exists? The sun's position relative to other stars is changing slowly all the time and thus there are always subtle and extremely small gravitational changes around the sun that can nudge objects out of the Oort cloud perhaps sending
I never mentioned anything to do with "100 miles". And if the 26,000 year event you're talking about is the 26,000 years that each cycle of precession takes to complete, there is an amazing amount of pseudo-scientific BS linking it to galactic alignments and 2012.
What am I suggesting is that given that the gravitational pull of the black hole at the center of the galaxy is 670,000,000,000 times weaker than the sun's gravitational force on us, so that even if me moved, let's say, 1% closer to the center of the galaxy (which would take 260 years travelling at the speed of light, so I'm deliberately using a hugely exagerrated number), the result would be a 2% in that 670,000,000,000 times weaker force it currently exerts on us and objects in our vicinity than the sun does. Given that the variation in local gravity as the distance between the earth, moon and sun changes over their orbital cycles is millions of times greater, I'm struggling to see what effect it is that you think might be remotely significant. Any possible gravitational force changes related to our distance from the center of the galaxy is utterly swamped by factors of millions of billions greater by other local changes.