Recent content by tmst08

Thanks, Curl. I believe you have supplied the answer to a question that has occurred to me on occasion for many years, as did BH? near the top of this thread. I like this place. -Tom

So, I am referring to what I now know of as the ICRF. I believe a gyroscope maintains its orientation with respect to this - in fact ICRF may possibly be *defined* by gyroscope orientation. The fixed stars, or cosmos, are, at least to me, conceptually identical with ICRF. Then there is the...

Perhaps that is a satisfactory answer. But then why does it appear to maintain its orientation nearly exactly to the cosmos? Coincidence?

ICRF-2 is based on the the solar system barycenter rather than fixed stars? Is this only for expediency?

Thanks, Cleonis, for the heads up about the ICRF. I wasn't aware that such existed, nor the Gravity B Probe. Reference frame dragging is a curious concept. Can you say anything about how this concept may affect any notion of a postulated universal reference frame? After all, if local (dragging)...

Methinks it might be more accurate to say "the" non-rotating frame of reference, rather than "a", since it *does* exist and the problem is only in detecting it.

Another post in my quest for truth: I recently ran into some information about something called a sub-quantum or "Zero-point" field. Maybe a gyroscope maintains its orientation with respect to this. Sounds like an "ether" that has been variously postulated.

I'm still wondering about this. In any explosion, from the viewpoint of any particle within the expanding material, the particles further from the point of origin are moving away at a faster rate than those closer to the point of origin. Do we see this in the observable universe? Is the red...

I am wondering why the universe seems to be expanding equally in all directions from our point of view. If the galaxies are moving away from a central point of expansion, the ones nearer the point should seem to be moving away at a slower speed.

I neglected to mention my appreciation for D H tying together the concepts of rotational and linear inertia, here. So my question is really subsumed by the idea of an absolute inertial reference frame? It has occurred to me that there's something odd about inertia. Is there something called an...

Thanks. I now know the idea has been considered and apparently has been a subject of some contention in various circles, at least if the Wikipedia article I scanned is somewhat correct. That's interesting about Mach's Principle and it being somehow related to Einstein's relativity theories...

Maybe you can think about the revolving sphere spinning on a 2nd axis such that the original axis sweeps out a plane. Hmm...

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A spinning object such as a gyroscope is known to maintain its orientation. I am wondering *what* it maintains its orientation with respect *to*. One answer is itself. Something else I have read is "with respect to the distant stars". If it is not with itself but with "distant stars", one can...