Gravitational Waves Discovered
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- Опубліковано 31 тра 2024
- Without exception, Gravitational Wave discoveries are one of the most important developments in all of science. Predicted by Einstein in 1911, they were finally observed in 2016. This is part of my complete intro Astronomy class that I taught at Willam Paterson University and CUNY Hunter.
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www.ligo.caltech.edu/page/pre...
www.eurekalert.org/multimedia...
hubblesite.org/images/news/rel...
chandra.harvard.edu/photo/2017...
public.nrao.edu/news/radio-ey...
www.spitzer.caltech.edu/images...
www.ligo.caltech.edu/images
www.ligo.caltech.edu/video/li...
www.ligo.caltech.edu/video/li...
www.ligo.caltech.edu/video/li...
Supplement the videos with "OpenStax Astronomy"
openstax.org/books/astronomy/...
23: The Death of Stars
openstax.org/books/astronomy/...
24: Black Holes and Curved Spacetime
www.ligo.caltech.edu/page/about
The Laser Interferometer Gravitational-Wave Observatory (LIGO)
www.nobelprize.org/prizes/phy...
The Nobel Prize in Physics 2017
en.wikipedia.org/wiki/First_o...
First observation of gravitational waves GW150914
www.ligo.caltech.edu/gallery
LIGO Gallery
en.wikipedia.org/wiki/Hulse-T...
Hulse-Taylor binary
www.black-holes.org
Simulating eXtreme Spacetimes (SXS) project
• Most Precise Ruler Eve...
Most Precise Ruler Ever Constructed
sci.esa.int/lisa-pathfinder/56...
Gravitational Wave form
en.wikipedia.org/wiki/Gravita...
Too Much on Gravitational Waves
www.ligo.caltech.edu/image/76
Known black holes
en.wikipedia.org/wiki/Lovell_...
Lovell Telescope
www.jb.man.ac.uk/news/2004/dou...
First-Known Double Pulsar Opens up New Astrophysics
www.eurekalert.org/pub_releas...
Discovered! Neutron star collision seen for the first time
en.wikipedia.org/wiki/Kilonova
Kilonova
www.eso.org/public/videos/eso...
Neutron star merger animation ending with kilonova explosion
www.eurekalert.org/pub_releas...
First observations of merging neutron stars mark a new era in astronomy
svs.gsfc.nasa.gov/12740
Doomed Neutron Stars Create Blast of Light and Gravitational Waves
www.caltech.edu/news/caltech-...
Caltech-Led Teams Strike Cosmic Gold
theconversation.com/cosmic-al...
Cosmic alchemy: Colliding neutron stars show us how the universe creates gold
hubblesite.org/image/4077/news...
The First Light with Hubble
www.spitzer.caltech.edu/images...
The First Light with Spitzer
chandra.harvard.edu/photo/2017...
The First Light with Chandra
public.nrao.edu/news/radio-ey...
The First Light with the VLA
0:00 Introduction
1:00 September 14, 2015 - 1.3 billion years...
4:47 The Sound of Two Black Holes Colliding
6:10 2017 Nobel Prize in Physics
15:03 Nearly flat spacetime with a little bump
21:30 So how do things move as the wave passes by?
23:24 BUT, they do change distance!
26:15 Gravitational Wave Observatories
28:25 Wave Patterns of Gravitational Waves
34:08 The Most Precise Ruler Ever Constructed
36:46 Zooming into an Atom
38:12 Gravitational-Wave Observatories
48:29 Timing and Profile of the Signals
53:19 Spiraling Black Holes
55:05 Warped Spacetime Around Colliding Black Holes
59:53 Exaggerated Effects of Gravitational Waves - Наука та технологія
Professor Kendall, I just have to thank you for posting these fantastic lectures. I listen to them all every few months, and they just never get old. I know I'm probably asking a lot, but I genuinely hope you do more of these in the future (although you've already covered just about everything worth covering, in my eyes, but I'm confident there have to be other things unbeknownst to me that I would find just as enthralling)
Again, thanks and I hope all is well.
Glad you like them! Yes, there are quite a few subjects I did not touch on. Cosmic rays, exoplanets (ehrmagehrd), planets (in general), space weather, human exploration, robotic exploration of the solar system, advances in the space industry, space policy....
@@JasonKendallAstronomer All of that is music to my ears! If you decide to put out a lecture on any of these topics, know that you'll have at least one view haha
That animation of the tubes, and the whole video, was as good a description as I've encountered. Good work.
Glad you liked it!
@@JasonKendallAstronomer Well deserved tribute. If you haven't exceeded your quota of stupid questions, I've never believed gravity needed a force-carrying particle, but what properties would allow it to escape a black hole, if one existed. Sorry, it's what happens when you expose yourself to the world.
Amazing videos, criminally underated
Congratulations. You managed to communication the "essence" of GR and Differential Geometry in < 70 mins.
Wow, thanks!
Great explanation sirr
Thank-you sir
Amazing thank you
I have seen many videos about ligo-virgo, but the part beginning in 42:50 is new to me, jaw dropping.
Just to imagine Prof Weiss, planning as a student perhaps the most precise instrument possible nowadays, one which even Einstein said would be impossible to build, and actualizing his plan along 50 years of perseverance, is for me an amazing personal, human, scientific, story and achievement.
(and to think that Germany, the origin of so much great science, would send him to the gas chambers only because he was a Jewish child, is also a symbolic aspect of Western civilization, which I will never be able to grasp. )
You've captured it. This discovery is truly astounding.
@@JasonKendallAstronomer You see, Rai Weiss is just 16 years older than me, and less than 20 years younger from my parents, who also studied in Vienna and had to escape the Nazis, so it is all so real for me, and his genius, nice personality, perseverance, and achievement are so amazing... Also the other members of his staff are such nice people to listen to, the whole thing is of the sort that makes me say, and in spite of all, it is worthwhile to stay around for a little while more, incredible things are still happening. Altogether the dimensions of the modern measurement tools are amazing: The SK telescope in Australia and Africa, the CERN machine, the south pole drills to detect those particles, even something like the James Webb, just to compare it to the ground breaking tool a few hundred years ago, with all respect to Galileo's telescope, -- it is impressing LOL. And never accuse me of under appreciating the great achievements of the past. I adore people like ("people like" ha?) Euclid, Aristo, Kepler, Newton, etc etc to the 19th and 20th century. Still, I am impressed! LOL
How could the explosion of 2 relatively small black holes be the most powerful event except for the big bang ?
Does this finding support quantum gravity theory? Thank you professor Kendall.
Actually it supports the classical Einsteinian Relativity. There is no need to include quantum gravity to explain the observations.
Yea, the most incredible part is 3 solar masses converted to gravitational waves! Agreed!
Tantalizing thoughts arise
Binge watching your lectures, and in your slide "Nearly flat spacetime with a little bump", shouldn't the dr2 term be 1/ (1+ ...)? I think that's what you had in your Black Hole lecture.
I’ll look at it. Thank for being thorough
@@JasonKendallAstronomer I tried looking up the equation on line, but my maths isn't good enough to rearrange the equation. Sorry, I couldn't remember which of your other videos the equation was presented.
You hear chirps like that all the time on Ham radio.
warp and woof
The essential foundation or base of any structure or organization; from weaving, in which the warp - the threads that run lengthwise - and the woof - the threads that run across - make up the fabric: “The Constitution and the Declaration of Independence are the warp and woof of the American nation.”
Indeed!