I don't know what your background is and I'm just a layman who reads a lot about this stuff (with what little free time I have). I would love to see Velikovsky debunked but at this point I'm still keeping an open mind. My first question to you is what, of the anomalies descibed in his book, are the explanations that we have today? Why in the world are there huge masses of mammoth bones (and other animals) piled up in Alaska and Siberia, shattered and mixed in with gravel and broken trees? What of the caves in England and the other anomalies in the book?
Another thing that bothers me is why don't we learn about these anomalies? Are they really anomalies if there is evidence across the globe? I don't have the book with me to pull examples so I'm just going by memory. I'm not a Velikovsky apologist but it is interesting to me that only in his books do I hear about evidence like this.
You sound like you know what you're talking about and you seem familiar with Velikovsky so I'd love to hear what you have to say- like I say I have an open mind.
Let's look at Venus. It allegedly was expelled from Jupiter. Now Jupiter rotation period is about 10.5 hours, the shortest of the principal planets. It is beyond reason to assume that an expelled Venus would have a near zero rotation rate. Yet that is what we observe today. The alleged changes in Earth's rotations would not absorb all of Venus' angular momentum, so where did it go? What mechanisms exist to transfer angular momentum from Venus to Earth? Both Venus and the Earth have insignificant magnetic fields, nowhere near strong enough to repel a collision, as described in Worlds. Imagine defending yourself from steel jacketed bullets by waving a refrigerator magnet around.
And Venus now has the least eccentric orbit of any body in the solar system. How? It would require the application of considerable force at it's aphelion to change it's orbit from "earth crossing 50 year eccentric" to "near perfect circle" ("sort of eccentric" for Mars).
I'm not going to calculate the forces needed, but I do believe it would require changing the speed of the planet by approximately 7 miles per second or so. I don't think any body could survive the impact needed to effect that large of a change.
No, you won't see much debunking going on here. The "anomalies" Velikovsky noted certainly cannot be explained by presuming bumper car planets. Nope.