Interesting coming from the poster with multiple 'rants'.
You clearly have an agenda, just as clearly promoting it.
btw, please don't include the innocent in your dirty little fiasco(s) down south of our border. We prefer not to be defined by your baggage.
Surely you jest. This is about the 'three', er..four(either Shemp or Curly)of you. You'll need to inquire of the bubble boy.
or TNT
😊
What I hope to do over the next few weeks is find time to study General Relativity in some depth:
https://en.wikipedia.org/wiki/General_relativity
I hope to be able to find Einstein's two papers on the subject:
https://en.wikipedia.org/wiki/List_of_scientific_publications_by_Albert_Einstein
That and watch Susskind's lectures:
I can't really see a way to make progress by any other route.
I have heard that Einstein's papers are very readable. We'll see.
https://en.wikipedia.org/wiki/General_relativity
I hope to be able to find Einstein's two papers on the subject:
https://en.wikipedia.org/wiki/List_of_scientific_publications_by_Albert_Einstein
That and watch Susskind's lectures:
I can't really see a way to make progress by any other route.
I have heard that Einstein's papers are very readable. We'll see.
I have found an English translation of some of Einstein's papers on General Relativity:
https://einsteinpapers.press.princeton.edu/vol6-trans/42
Hope it doesn't get too heavy! 🙁
https://einsteinpapers.press.princeton.edu/vol6-trans/42
Hope it doesn't get too heavy! 🙁
The prerequisites for learning General Relativity are as follows:
- Learn vector calculus and calculus-based physics.
- Learn electromagnetism (not absolutely necessary, but it’ll help).
- Learn the basics of special relativity.
- Study some tensor calculus and differential geometry.
- Build some intuition for general relativity.
- Study from a good general relativity textbook.
https://profoundphysics.com/how-to-learn-general-relativity-a-step-by-step-guide/
Me? I'll be renovating some speakers! 😀
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Nice photo of earth - moon system nasas-lucy-spacecraft-captures-earth-moon-ahead-of-gravity-assist.
It takes ~1.28 s for light to traverse from earth to the moon yet we have > 60cm oceanic tidal range, gravity is truly powerful.
It takes ~1.28 s for light to traverse from earth to the moon yet we have > 60cm oceanic tidal range, gravity is truly powerful.
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A photo taken by NASA's Lucy spacecraft which has been launched to to explore the Trojan asteroids, a population of primitive asteroids orbiting in tandem with Jupiter.
Just don't mention the word fossils! 😉
https://solarsystem.nasa.gov/missio...d,Ingalls | Full image and caption About Lucy
The Lucy mission is indeed off to visit and photograph Jupiter's Trojan asteroids, which is that 60 degree Lagrange point business:
https://www.nasa.gov/feature/goddar...thousands-of-objects-for-earth-gravity-assist
Already has found an unexpected one with a moonlet 480M miles away if I follow.
https://www.nasa.gov/feature/goddard/2022/nasa-s-lucy-team-discovers-moon-around-asteroid-polymele
I am in luck with General Relativity, since I already have one of the recommended books:
A Lenny Susskind title, Special Relativity and Classical Field Theory. It is better written than the first volume, which was Classical Mechanics and rather lightweight.
It is annoying that I am missing the second volume on Quantum Mechanics, but the library has it. It's these Tensor things that worry me. But we shall get there.
Already I am learning about rotating reference frames, and frame dragging around rotating objects. General Relativity involves non-linear equations, since the gravity field possesses mass and energy in itself.
https://www.nasa.gov/feature/goddar...thousands-of-objects-for-earth-gravity-assist
Already has found an unexpected one with a moonlet 480M miles away if I follow.
https://www.nasa.gov/feature/goddard/2022/nasa-s-lucy-team-discovers-moon-around-asteroid-polymele
I am in luck with General Relativity, since I already have one of the recommended books:
A Lenny Susskind title, Special Relativity and Classical Field Theory. It is better written than the first volume, which was Classical Mechanics and rather lightweight.
It is annoying that I am missing the second volume on Quantum Mechanics, but the library has it. It's these Tensor things that worry me. But we shall get there.
Already I am learning about rotating reference frames, and frame dragging around rotating objects. General Relativity involves non-linear equations, since the gravity field possesses mass and energy in itself.
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"Frame-dragging" is when spacetime itself gets dragged round by a rotating object.
The effect was first predicted in 1918 as a natural consequence of General Relativity (GR).
It was confirmed Earth generates frame dragging in line with GR's predictions when the NASA Gravity Probe B (GP-B) mission managed to measure the effect around our planet.
https://www.nasa.gov/mission_pages/gpb/
Observations of frame-dragging have been made around distant black holes.
A wobbling of the accretion disc, similar to the wobbling of a spinning top as it slows down, apparently provides evidence of frame-dragging.
How do we know that the only thing that ever happens isn’t just the accretion disc and the emission beacon? Where is the evidence that there even is an event horizon? Where is the evidence that matter enters a black hole?
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