Stellar Oscillations across Spiral Arms

The speed of an interstellar comet near the Earth would be very near 42,000m/s no matter what the its speed was prior to entering the gravity field of the sun. It can be less than that by the comet passing close to an encounter with Jupiter.

Hmmm. Slow things speed up as they fall, fast things slow down as they fall ...

And the dividing line is 42. (I suspect Doug is chuckling about that.)

Interesting.

Jim,
Gravitational force between any two objects is independent of their relative speed, so already fast comets only become faster as they approach a star. Impact is the only phenomenon that could slow Sosah's very high speed, central spiral arm proto-comets down as much as you suggest. Any other explanation would be against the Law of Conservation of Energy.

When I wrote "[Multiscale] Sosah proto-. . . cometary orbit intersections with asteroids or planets would manifest as explosive impacts. Hence my S1, S2 at metaresearch.org/msgboard/topic.asp?TOPIC_ID=692 .", I was alluding to what C. Johnson had written very plausibly, the whole article is plausible, just above the "When" heading in the middle of his article at

mb-soft.com/public/extinct.html :

". . . near the [spiral arm] centerline, there are two complicating circumstances . . . the Sun (and Earth) enters that area with a substantial lateral velocity, around 23.8 km/sec (around 51,000 mph), and . . . there are OTHER stars and objects (half a cycle out of phase with the Sun) that are moving in the opposite direction at around the same velocity! These are tremendous differential velocities! Head-on collisions, even with relatively small objects, could have ferocious impacts!¡±

Note that we won¡¯t be in this situation for another ~20 myr.

Peter Nielsen

Email: uusi@hotkey.net.au
Post: 12 View St, Sandy Bay 7005, Australia

Relative to the excape velocity fast moving objects are slowed and slow moving objects are speeded up in a gravity field. It is logical because the time a slow moving object spends being accelerated is much greater than a fast moving object spends getting from the same starting point to the same finish point in the field. You need to eliminate angular momentum first, of course.

[Jim] " ... fast moving objects are slowed and slow moving objects are speeded up in a gravity field."

This is an unusual model of gravity you have presented here. Is it your own, or did you borrow it from someone else?

LB

LB, There seems to be a lack of focus here. The relative speed and not absolute speed is the focus of the statement you are questioning.