Recent content by Billy T

That is the way Nereid defined it for me, but let's imagine a solar system containing just three objects, which I will continue to call, Sun, Jupiter and Pluto with roughly their same great difference in masses, but to make the case more extreme, let's assume this "Pluto" has an orbit plane...

I will. You did not offer your opinion on the chance their few from many observations do imply gravitational lens instead of some intrinsic stellar temporal variation. I suspect that they explored two different wavelengths in an effort to rule out surface temperature changes, but how do they...

Please elaborate, I must be dense as I don't understand that "detecting a perturbation" does NOT imply "that Neptune was perturbed." I don't care what it is called, but something about Neptune, especially in the late 1920, caused Lowell to spend a lot of money, hire people specifically to...

This thread asks: Can we be sure no local black hole exists? It will, I hope, focus on an effort to make at least an OOM estimate of photographic detection (visible light) by “weak quasar” radiations that may be produced as solar wind (or ISM if the BH is far away, where the solar wind density...

Until some one refutes my Sun, Jupiter, Pluto argument/example of baricenter "wobble" I will hold the view I expressed in the last quote of post 1. I also note now for the first time, that the line of importance (assuming Earth based observations of black holes gravitational lens effects) is...

Could not get the OGLE (Princeton site very slow or not up) but the MACHO events (especially bulge event 1) were very interesting. Because they are nearly symmetric bell curves, instead of asymmetric ones, I am inclined to believe they are due to some lens effect and not some intrinsics stellar...

OK, I'll look in Celestial Mechanics soon and repost my Sun,Jupiter & Pluto counter example there, if not well rebutted. No I did not look, just assumed they were satellites I had no knowledge of. thanks for the references. I will look at them also.

To LindaGarrette: In post 49 I agree with you when you say: “Most people are very confused about both the definitions and the philosophical interpretations of determinism and free will. Determinism means predictability…” Because your own statement is either simply wrong or an extreme...

Ok, after this post. I think I will follow your suggestion (start a thread about photographic detectability, if any, of really near by (100 to 200AU) black hole in the 0.5 to 2.0 MSolar mass range via what I have called "weak quasar radiation" due to capture of solar wind.) If I do, I want to...

Thanks for the definition. Because of the 1:1000 ratio, the distance from the sun, I'll call it X, is approximately 0.8 Million Km along the line joining them, and dos ont move as both orbit it. More accurately, 1000X = (800 - X) is sovled to find the distance from the sun. I have been away...

OK, I would like to know that rate. I think someone can make correct OOM estimate of the luminosity by following approach: Try to compute the collision rate and assume each collision between atoms (even with an ion) but not ion/ion collisions produces one visible photon (detectable in Earth...

From context, I assume that "baricenter" is the center of the star being lensed, but since any star seen from Earth (other than sun) is a "point" I am not sure. Again from context, it seems clear to me that the motion of the BH that is important is the component of its motion that is...

You might be interested in current thinking about the perturbations of Neptune that led to the discovery of Pluto. They certainly were not due to Pluto, which is smaller than Earth's moon. Pluto would need to be several times more massive than the Earth (and was believed to be for many years) to...

I don't know if it is helpful or not but before GPS, the Applied Physic Lab of JHU, where I worked developed for US Navy a series of navigational satellites that were immune to atmospheric drag, solar radiation pressure, Etc. There was a "proof mass" - a small sphere (1.3 cm diameter as...

Very interesting and your knowledge very impressive. Is it correct to infer from this "shot noise problem" that it is actually easier to detect presence of mini BH, via gravitational lens effects, if it is not too close to solar system? I also wonder about the detection of it by capture of...