beecee

My dentist has a sense of humor and sent me this video along with appointment time. https://www.youtube.com/watch?v=lC3iwF6p6e0 Jokes aside, I have been extremely lucky with my dental health...two fillings and two extractions over 74 years. My apparent problem now is some sensitivity. ps: As a kid, I was never really into lollies and sweets too much...That along with the obligatory brushing twice a day and mouth rinsing seems to have kept me in reasonable health.

Today I must overcome a very real fear and dread of mine, by attending a dental appointment, the first in around 10 years. Please pray for me.

The logic and sensibility of science.

Yep, probability also.

No, from the frame of reference of the poor soul crossing the EH, he or she will reach the center and doom in a small finite time. From the frame of reference of a distant observer, that poor soul will simply be redshifted and eventually fade from view before crossing the EH, due to ever infinitely increasing time dilation.

Simply that light and fundamental matter can exhibit both particle and wave properties.

Whether the universe/spacetime is finite or infinite, is unknown at this time. In either scenario though, there is no center or edge to speak of. The universe has been shown to be topologically flat within very small error bars, which probably infers the universe is infinite, but we are unable at this time to rule out a torus or donut shape, which would infer a finite flat universe. If the universe was closed, we could be sure that it was also finite, but again, with no center or edges, much as the surface of a globe or balloon.

Newton's laws also apply to GR. Einstein's equations reduce to Newtonian at non relativistic speeds. If the Earth stopped rotating suddenly, anything not attached will go flying off at a tangent. Buildings and such will certainly collapse as the atmosphere will keep rotating, and obviously winds of extraordinary hurricane force will be experienced. Not sure I understand properly. Everything works in certain ways and we model these things to reflect what we see. https://www.youtube.com/watch?v=MO0r930Sn_8

Both on Netflix I recall, although Pine Gap was also on the ABC, [Australian Broadcasting Corporation] which is distinct from the other free to air TV stations and the "reality tv show" plague. Pine Gap was excellent, although I have not seen the other one. I recently saw a doco entitled "Love and Bananas; An Elephant Story" It is on Stan and have been told also Netflix as well of course on dvd. Incredible story but please keep a box of tissues handy! Another excellent movie length doco is "Blackfish"also on Stan, and about Orcas in captivity. Both excellent.

[somewhere] The Lord said to Lazarus, come forth: But Lazarus was slow and came fifth.

TV at this time, at least in my country has gone totally bonkers with the screens flooded with so called nonsensical "reality TV", from cooking shows, to getting married to others you have just met. I have a great collection of movies though and Netflix and Stan to escape such nonsensical falsities as these so called reality shows.

Not at all. The Catholic Church find it acceptable to accept the theory of evolution of life and the BB. In fact it was a Catholic priest who suggested the BB. From there though they chose to depart from science and the scientific method, and put both theories down as the work of a God. Science either gives us answers to how the universe and us came to be, [theory of evolution and the BB] or it remains uncertain and continues research into possible answers and further knowledge. It does not invent any mythical, magical, unscientific, supernatural or paranormal reasons to fill in the gaps.

Wrong...The current understanding of the universe is due to physics/cosmology, state of the art equipment and the associated data gained, and the professionals that determine the best interpretation of what we observe. Maths is simply the language they use and Bishop Barkley does not have the expertise or learning to comment. Space and time, and spacetime are real aspects that are affected by mass/energy. What discrepancies? And the examples you gave are not discrepancies, Yes and as explained in another thread, that is because over large scales, expansion overcomes gravity as explained by the more accurate and precise GR. Not sure what you are getting at, but yes, correct so what? Oh and certainly no butts about "if gravity is an attractive force", both in Newtonian and due to the curvature of spacetime in GR. Again, the observational data tells us that the universe is expanding over large scales, and accelerating in that expansion rate, while the gravity [curved spacetime] from the larger mass energy densities over smaller scales such as our local group of galaxies and beyond, have such regions decoupled from the overall large scale accelerating expansion. No problem there. ??The CMBR is observed everywhere and is a left over, relic heat from when the observable universe was smaller, denser, and hotter. This has nothing to do with MOND. Nup, just Mother Nature and coincidences. Not really too interested in this Barkley bloke, but Einstein as great as he was, was also at times wrong, and one of the areas he did seem to err in was quantum theory and what it entails. At least he had some misgivings about it, But also worth noting that another bloke called Neils Bohr [I think] or was that Feynman? said that anyone that claims to understand Quantum mechanics, does not really understand Quantum mechanics, or words to that effect.

No probs...We seem to be on the same page anyway, offering encouragement.

I certainly did not mean to be harsh, and I certainly did not see any schizophrenia claim. I was trying to express sympathy for his "problems" and offer some suggestions in turning it around. Obviously proper professional help would also be advisable in that case.

Getting down to the nitty gritty, it is painfully obvious, you are lonely. That is also evident by other threads you have created. I find it rather hard to give any advice, as I have in general always had a full and interesting life. And let me say, I did not leave home until I met my Mrs at the age of 31 years. In essence you are the only one capable of getting out of the hole you seem to have put yourself in. My suggestions would be, think back over your life to a time when you were happy and content...why were you happy and content? Who were your friends then? What were you doing? What were your interests? Other advice I would give would be go out and do a course or study some aspect that may alleviate your self induced dull life....take an interest in people...ask them questions...answer there queries...Get yourself a dog...go to a training school....again meet more people who also have dogs. Best of luck!!

I believe my own thoughts as scientifically based as I hope they are, are more realistic then pessimistic or even optimistic. The universe evolved by chance, with conditions suitable for life, and as a result by chance I was born and in time will kick the bucket as all living things end up doing. That's the way the cookie crumbles.

Firstly the factor that determines whether the universe is flat, is an energy density parameter we call Omega. That is as close to 1 as our precision allows which tells us that the universe/spacetime is flat....meaning that two parallel beams of light will remain parallel. That total mass energy density includes DM, DE and the baryonic matter we are familiar with. Also the trampolin analogy is a 2D analogy attemting to explain spacetime warpage in 3D plus time. Hence the difficulty and dangers in taking analogies too far.

Accepting that this is first and foremost a science forum, and that questions/claims/answers should be governed by the scientific method. [1] Separate scientific theory from speculation. [2] Accept that beliefs without evidence, are just that, beliefs. [3] Support your answers with reputable links.

Not at all. Inflationary theory is part of the BB scenario and was added to explain a couple of anomalies, namely the Flatness and Horizon problem. The main proposal of the BB, is that the universe/spacetime evolved from a hot dense state. We have ample evidence that this is so. https://en.wikipedia.org/wiki/Big_Bang Timeline of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. On the left, the dramatic expansion occurs in the inflationary epoch; and at the center, the expansion accelerates (artist's concept; not to scale).

The job of science is to model the universe as we observe it, and extrapolate as far back as is necessary, to be able to describe the evolution of the universe. So far we are able to reasonably go back to t+10-43 seconds. Any form of ID or any seemingly magical creator is an unscientific concept. Any religious answer or ID is mythical without any evidence to support it.

In part I agree. While accepting that movies and acting are just that, as opposed to reality, I personally grimace, turn away, or close my eyes in disgust at some of the portrayals of violence, torture etc. This also happens to me in real life when confronted with blood and gore. Many years ago, when my Son was around 5 years old and had just learnt to ride a bicycle, he came off it and split his chin open. We [the Mrs and I] rushed him to Casualty at the local Hospital and the doctor asked me to hold him while he gave him an injection to deaden the pain and put in 5 stitches. After it was over and my son stopped crying almost immediatly, the doctor had to turn his attention to me, half collapsed in a chair ready to be sick! The same applies to violence. A Sicko former work mate of mine, brought in a video one day of a terrorist beheading. There was no way in the world that I was ever going to watch it, and we nearly came to blows over his insensitivities to such disgusting, depraved actions. Which raises the question of whether such realism is needed in movies today. I'm not speaking of the mundane scenes of someone being shot, rather the blood and guts that now days inevitably go with it.

https://phys.org/news/2019-02-exiled-planet-linked-stellar-flyby.html Exiled planet linked to stellar flyby three million years ago February 28, 2019, University of California - Berkeley Some of the peculiar aspects of our solar system—an enveloping cloud of comets, dwarf planets in weird orbits and, if it truly exists, a possible Planet Nine far from the sun—have been linked to the close approach of another star in our system's infancy flung things helter-skelter. But are stellar flybys really capable of knocking planets, comets and asteroids askew, reshaping entire planetary systems? UC Berkeley and Stanford University astronomers think they have now found a smoking gun. A planet orbiting a young binary star may have been perturbed by another pair of stars that skated too close to the system between 2 and 3 million years ago, soon after the planet formed from a swirling disk of dust and gas. If confirmed, this bolsters arguments that close stellar misses help sculpt planetary systems and may determine whether or not they harbor planets with stable orbits. Read more at: https://phys.org/news/2019-02-exiled-planet-linked-stellar-flyby.html#jCp the paper: https://iopscience.iop.org/article/10.3847/1538-3881/ab0109/meta A Near-coplanar Stellar Flyby of the Planet Host Star HD 106906 Abstract: We present an investigation into the kinematics of HD 106906 using the newly released GaiaDR2 catalog to search for close encounters with other members of the Scorpius–Centaurus (Sco–Cen) association. HD 106906 is an eccentric spectroscopic binary that hosts both a large asymmetric debris disk extending out to at least 500 au and a directly imaged planetary-mass companion at a projected separation of 738 au. The cause of the asymmetry in the debris disk and the unusually wide separation of the planet is not currently known. Using a combination of Gaia DR2 astrometry and ground-based radial velocities, we explore the hypothesis that a close encounter with another cluster member within the last 15 Myr is responsible for the present configuration of the system. Out of 461 stars analyzed, we identified two candidate perturbers that had a median closest approach distance within 1 pc of HD 106906: HIP 59716 at pc ( Myr) and HIP 59721 at pc ( Myr), with the two stars likely forming a wide physical binary. The trajectories of both stars relative to HD 106906 are almost coplanar with the inner disk (Δθ = 54 ± 1.7 and ). These two stars are the best candidates of the currently known members of Sco–Cen for having a dynamically important close encounter with HD 106906, which may have stabilized the orbit of HD 106906 b in the scenario where the planet formed in the inner system and attained high eccentricity by interaction with the central binary. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: So we have mathematical evidence that the hypothesised Planet X or 9 if you prefer, [being rather old school, Pluto still holds that spot imho] may actually exist somewhere. It may also explain some of the anomalies of orbits of comets and KBO's from past reports. From memory of past hypothesised accounts of Planet x, it would obviously have a highly elongated orbit, being taking around 20,000 Earth years to make one orbit. Just as obviously if it is near its Aphelion, this can explain why it hasn't yet been visually detected. The data and mathematics also could be explanations of other possibilities also. While we are able to determine the presence of extrasolar planets by the gravitational tugs they have on their parent Star, is this methodology possible within our own system? My thoughts, probably not, simply because we are too close and actually part of that system. Any thoughts?

https://medicalxpress.com/news/2019-02-mobile-bedside-bioprinter-wounds.html Mobile bedside bioprinter can heal wounds: Imagine a day when a bioprinter filled with a patient's own cells can be wheeled right to the bedside to treat large wounds or burns by printing skin, layer by layer, to begin the healing process. That day is not far off. more at https://medicalxpress.com/news/2019-02-mobile-bedside-bioprinter-wounds.html

How I missed that oh so obvious faux pas, I do not know!