Recent content by 1977ub

Thank you - I was also wondering of Pluto itself has such a path.

Asimov pointed out that Earth's Moon is nowhere concave (looped) in its motion with regard to the Sun. What about Pluto and Charon - are both concave w.r.t. the Sun at certain times? Moreover, what is the largest body in the solar system which is sometimes concave w.r.t. The Sun? Thank you...

I wonder if one could try to remove the confounding influence of velocity between differing frames. A probe can be edged toward a gravitating body, and at each step, held so that it is a constant distance, then the probe definitely reports slower clock speeds the closer it gets. This could be...

A cat or a human is made of particles ... in physics terms is there any evidence that an animal is more than the sum of its parts?

Is a cat more of an observer than a molecule or a particle?

And it will have an pull on an observer more than Newtonian gravity would predict?

I had become convinced that kinetic energy increases the effective gravitational influence of a body - as measured by an observer who finds the body to be moving. No?

Which forces remain which are unqualified? Which forces remain that are not in need of any qualifier? If they are mediated by exchanges of particles, what do we gain by referring to them as forces?

Not only "not contradicting" but also presumably 100% constrained by.

It is important to understand that the difference between inertial vs. non-inertial frames is not simply a matter of geometry - it is something physical, which needs to be detected.

If there is no friction, can the hamster succeed ?+

If the vapour is less dense, and the particle is interacting with vapour less often, is there less of a linear appearance to the trajectory - more erratic?

no photon is traversing it. if it is a small unit carrying a communication at "FTL" then causality will be violated.

A small kernel of heavily warped spacetime in a large ocean of flat-ish spacetime such as between here and alpha centauri. This is why i described the vehicle to be within a black box. At the quantum level, spacetime may be heavily warped but that doesn't enable FTL communication or travel at...

The question is - is this a technology which can be operated at will. That would be different from the issue of whether nature might generate something like this, outside of human intentions. If I have a friend 4 light years away, and one day I've got a black box I invented which can send him a...