Well, before I take a dive into the Dirac Sea, I need to explain how I got to the edge of it!
A few days back, one of my web searches brought me to yet another talk about Black Holes, specifically if gravity is trapped in them like Light is said to be...reason Black Holes are black is they have such strong gravity that light can't emit, or 'escape'...but apparently, and I'm lost right away considering this, Gravity can reach out from a Black Hole and bring Stars and Interstellar Gasses into it....
...not long ago, Astronomers were observing a Star at the Center of the Galaxy, where there is a Black Hole, and it was on an orbit that might take it into the Black Hole...one scientist has it that when a Star or large Planet falls into the Black Hole, it explodes, or something like that, and sends out a wave, or something, through out the Galaxy...and these waves in the past have reached the earth causing catastrophic events...brb...
quote
Scientists around the world are tracking a doomed cloud of gas as it makes a daring approach toward the monster black hole at the center of our Milky Way galaxy, a cosmic encounter that might reveal new secrets on how such supermassive black holes evolve.
Doomed Space Cloud Nears Milky Way's Black Hole as Scientists Watch
unquote
I'd happened on that story looking up Nibiru, the ufo lore's Planet X, which had taken me to the dire threat that Stars falling into our Galaxy's Black Hole cause a Galactic Superwave...apparently, in the Geologic Record there are layers of Gamma Ray effect sediments, which such a Superwave could have created...there's a scientist (pseudoscientist?) who is a proponent of this notion, and even established a kind of watch dog group to give everyone a heads up if such a wave is on its way...which is difficult to do, as the wave traveling near the speed of light reaches us just as light from the center of the galaxy does, so no warning is much possible...but observing a star or gas cloud nearing to falling into the black hole, might...astronomers could calculate how long before the star would drop, and that would give some lead time...this is all beyond, but here's link to the scientist's theories...(the doomed cloud didn't fall into the hole, it would seem)
quote
Compelled by his decryption of an ancient warning hidden in zodiac constellation lore, LaViolette worked with information from many scientific sources, including astronomical observations, polar ice core measurements, and other geological data, to confirm that our Galaxy’s core exploded, unleashing a barrage of cosmic rays that arrived near the end of the last ice age. This barrage caused the solar system to become enveloped in a dense nebula, which led to periods of persistent darkness, frigid cold, severe solar storms, searing heat, and mountainous floods that plagued mankind for many generations.
web review of his book Earth Under Fire
unquote
And I came to reading all this from searching out the Younger Dryas Ice Age, which happened about 11,000 years ago, which is a post in the works!...
So, so, I'm searching out that Dust Cloud and it takes me to a discussion of the Black Hole in the Center of the Galaxy and its Nature...at a site a question is posed...
quote
Q: If nothing can escape a black hole’s gravity, then how does the gravity itself escape?
unquote
and a physicist mathematician answers...that's what the web site is called, 'Ask a Mathematician Physicist!...and they provided a lengthy answer:
quote
Physicist: A black hole is usually described as a singularity, where all the mass is (or isn’t?), which is surrounded by an “event horizon”. The event horizon is the “altitude” at which the escape velocity is the speed of light, so nothing can escape. But if gravity is “emitted” by black holes, then how does that “gravity signal” get out? The short answer is that gravity isn’t “emitted” by matter. Instead, it’s a property of the spacetime near matter and energy.
unquote
At the end of his explanation, there is room for comments and more questions, and I tried to read through those too! And found one that begins:
quote
@The Physicist
Using a rubber analogy is kinda weird though, isn’t it? It draws back to the ether days of light theories. It’s almost like we’re attributing the speed of light to being similar to a sound wave, but through the medium of space-time.
unquote
And, and, I got to thinking, and made up a reply of sorts to that particular posters comment, and in general to the whole discussion, and posted it...like I've said before, I most often don't post to other sites, but this one got away, really away!
quote from me
David says:
end quote
here's link to site that web site:
http://www.askamathematician.com/2014/05/q-if-nothing-can-escape-a-black-holes-gravity-then-how-does-the-gravity-itself-escape/
now, now, it's not likely the Mathematician Physicist will deign to address my comment, or anyone else for that matter...I'm not a Mathematician Physicist...I just don't know the language being used...but nonetheless, I set out with my ideas and did, have been doing, some web searches...first, I looked on youtube for underwater explosions in slow motion (wait..first was scuba bubbles!)...don't know if Myth Busters TV show ever delved into such!...but here's two clips I watched...
Underwater Explosion Phenomena
http://video.mit.edu/watch/underwater-explosion-phenomena-2626/
Underwater Explosions - Slow Motion Dry Ice Bomb
https://www.youtube.com/watch?v=M5gHFJyMQ6o
and in the youtube thumbnails by these clips, other related clips to see, was this:
The Star in a Jar
https://www.youtube.com/watch?v=LWO93G-zLZ0
The way that was done, is a toaster wire was suspended in the water (which is in a round jar), and heated a little bit of the water at its tip, making a vapor bubble, and then sound waves come along, and, and what happens next I don't know...the bubble must focus the waves somehow, and molecules ignite...it's called sonoluminescence and they determine how hot it gets by the spectrum of light being emitted like at the edge of the star, which is a sphere just like a star, and at its center...it's just as hot as the sun!
Oh, this post is a work in progress, and I'm curious to see what my searches turn up!...next: The Dirac Sea
Oh!...editing, and rereading 'all things we know are bubbles', I thought to do a youtube search: soap bubbles combining...in this clip the wavering of the bubbles after they combine is telling!...compare it to the dry ice bomb clip...:)
DavidDavid
So, so, I'm searching out that Dust Cloud and it takes me to a discussion of the Black Hole in the Center of the Galaxy and its Nature...at a site a question is posed...
quote
Q: If nothing can escape a black hole’s gravity, then how does the gravity itself escape?
unquote
and a physicist mathematician answers...that's what the web site is called, 'Ask a Mathematician Physicist!...and they provided a lengthy answer:
quote
Physicist: A black hole is usually described as a singularity, where all the mass is (or isn’t?), which is surrounded by an “event horizon”. The event horizon is the “altitude” at which the escape velocity is the speed of light, so nothing can escape. But if gravity is “emitted” by black holes, then how does that “gravity signal” get out? The short answer is that gravity isn’t “emitted” by matter. Instead, it’s a property of the spacetime near matter and energy.
unquote
At the end of his explanation, there is room for comments and more questions, and I tried to read through those too! And found one that begins:
quote
@The Physicist
Using a rubber analogy is kinda weird though, isn’t it? It draws back to the ether days of light theories. It’s almost like we’re attributing the speed of light to being similar to a sound wave, but through the medium of space-time.
unquote
And, and, I got to thinking, and made up a reply of sorts to that particular posters comment, and in general to the whole discussion, and posted it...like I've said before, I most often don't post to other sites, but this one got away, really away!
quote from me
David says:
I cant remember what they do, but when I went scuba diving I was blowing bubbles, and they would rise to the surface…I’m trying to remember here if the big bubbles rose to the surface with the same speed as the small ones…easy to check…but what I think of here is of the few things I saw demonstrated in physics class, and that demonstration where a feather and a ball bearing fall at the same speed in a vacuum…now, the bubbles underwater are rising because they were made of air, and were in a denser medium, water…the pressure of the surrounding water forces them upward, in ‘bubbles’, to the lower pressure atmosphere above the ocean….I’ve tried to picture if stars and planets, all matter, aren’t ‘falling’, but rather ‘rising’ because of some density and pressure difference…that what we call empty space, is actually a denser something than matter…matter is to space what air is to water…well, maybe I’m thinking of the aether here?…I dunno…but the thought is that a black hole is just that, a hole in space, a kinda round little spherical bubble hole with the density of this aether around it, I imagine, and all matter, down to the tiniest, are lighter density than the aether, and are like tiny bubbles that will float/rise, not fall, into this black hole bubble, making a larger bubble we call a sun or planet…all things we know are bubbles, I might say!…and they join and separate according to the laws of physics, making the elements and compounds… this to say they are locked into their shapes (which are spheres at some point!) by the density of the surrounding aether…don’t electricians talk of ‘pressures’?…what would Tesla say of black holes, and the speed of light, and gravity?…explosives/explosions too are characterized as having pressure, yes?, and look very bubble like!…black holes are like an inside out explosions, matter exploding into them, even at the atomic size…we’re in the midst of a kind of exploding burning chaos…just day dreaming here…and making myself dizzy!…much to wonder about at this web site!
end quote
here's link to site that web site:
http://www.askamathematician.com/2014/05/q-if-nothing-can-escape-a-black-holes-gravity-then-how-does-the-gravity-itself-escape/
now, now, it's not likely the Mathematician Physicist will deign to address my comment, or anyone else for that matter...I'm not a Mathematician Physicist...I just don't know the language being used...but nonetheless, I set out with my ideas and did, have been doing, some web searches...first, I looked on youtube for underwater explosions in slow motion (wait..first was scuba bubbles!)...don't know if Myth Busters TV show ever delved into such!...but here's two clips I watched...
Underwater Explosion Phenomena
http://video.mit.edu/watch/underwater-explosion-phenomena-2626/
Underwater Explosions - Slow Motion Dry Ice Bomb
https://www.youtube.com/watch?v=M5gHFJyMQ6o
and in the youtube thumbnails by these clips, other related clips to see, was this:
The Star in a Jar
https://www.youtube.com/watch?v=LWO93G-zLZ0
The way that was done, is a toaster wire was suspended in the water (which is in a round jar), and heated a little bit of the water at its tip, making a vapor bubble, and then sound waves come along, and, and what happens next I don't know...the bubble must focus the waves somehow, and molecules ignite...it's called sonoluminescence and they determine how hot it gets by the spectrum of light being emitted like at the edge of the star, which is a sphere just like a star, and at its center...it's just as hot as the sun!
Oh, this post is a work in progress, and I'm curious to see what my searches turn up!...next: The Dirac Sea
Oh!...editing, and rereading 'all things we know are bubbles', I thought to do a youtube search: soap bubbles combining...in this clip the wavering of the bubbles after they combine is telling!...compare it to the dry ice bomb clip...:)
DavidDavid
