Matter vs. Gravity: Listening to Colliding Black Holes and Neutron Stars - Katerina Chatziioannou

[@brianwakil]

What a great educator! She has a gift for clearly describing, and illustrating very difficult concepts. Thanks Katerina!

[@rickrys2729]

Very clear and understandable presentation with great visuals and simulations.

[@dancooper8551]

Excellent lecture!

[@willyengland]

Is there an explanation for why gravitational waves travel with the speed of light?

[@captiveexile2670]

Consider this: You're given two spheres which both have a golden surface and their wights are identical. However, one is composed of pure gold with anir space inside and the other is light metal (aluminum) also with an air space inside. Q: How can one easily TELL THEM APART (without doing any other experiments on them)? ANSWER: (Roll them down an inclined plane, The one made of pure gold will ROLL MORE SLOWLY -- and the plhysical principle is the ANGULAR MOMENTUM--- the same thing that causes an ffigure skater to speed up when she brings in her arms that were extended from her body --- to end in a lovely pirouette and a bow, Thus one might say that evey large star than exhausts its nuclear fuel will no longer be be to support itself and so it collapses or (as it were) "brings in its arms" to spin even faster-as most neutron stars do spin in frictionless space after being formed, The "CRAB NEBULA" (rsult of a supernova seen by Japanese, Chinese astronomers & American Indians in the year 1054). The Hubble Telescope shiws a neutron star was left behind, still spinning faster than an Indianapolis race care engine at high RPM!'(So praise God...from whom all bkeswing flow--- the Bible tells me so----> ISAIAH 51:6 pairs with PSALM 102:25, AMOS 8:9?

[@captiveexile2670]

PS: That neutron star inide the CRAB NEBULA soins at a rate of one revolution EVERY 33 MILLISECONDS (or that point on its equator is moving FOUR MILLION MILES PER HOUR ! ! !

[@Tinker1950]

LOOK..... I've spotted a nutter! 👀

[@captiveexile2670]

Just think: a teaspoonfull of solid neutrons (the materiel of a neutron star) would weigh about = toa 167 Aircraft cariers stacked on top of each other! DAMN!

[@anaryl]

Almost the same yo m0m!

[@banditrider215]

? Could it be multiple Neutron Stars colliding with each other and filling the gap between Neutron Stars and Black Holes.

[@LaboriousCretin]

23:07 Singularity is another word for they don't know. R=0 virtual infinity artifacting. Finite system that evaporates. (Hawking radiation ) Nice talk. I can't wait to see them integrate gravitational wave detection with particle accelerator technology, beam line. Or a linked array to triangulate where the waves originated at. 55:02 Planckian limit. Degeneracy and wrapping and packing. Time distortion factors. Hawking radiation/evaporation and the end of a black holes life. Censorship says R=0 gets destroyed by light as it ramps up in evaporation and then stops. Showing a lower bound on white holes. The universe as a natural cutoff regime or limit for white hole. Thank you for sharing. Keep up the good work.

[@MichaelGowdy-x4d]

There is a linked array 2 in the US and one in italy

[@rajibuzzaman]

MIND VISUALS OVER EXPERIMENTAL OBSERVATIONAL VERIFICATIONS 5:06 5:09 5:14

[@rajibuzzaman]

I WAS AT BARC WHILE THE DETECTION OCCURED IN 2015 22.11.2024 8:19

[@cyclingnerddelux698]

WHY ARE YOU SCREAMING AT US? DO YOU NEED TO TAKE YOUR MEDS?

[@luizbotelho1908]

Gravitational Waves have the same physical existence status as orbitals on quantum theory of atoms and molecules .They are mathematical approximations solutions for quite complex equations.Perhaps useful as the the concept of orbitals are for quantum chemistry It is a first order LINEAR approximation for Einstein NON linear equations . By the way , Einstein theory only says that given a DEFINITE distribution of matter and energy in a given region of the space-time , there is an special intrinsically curved reference system defined by the Geodesic system of coordinates associated to A WELL DEFINED METRIC STRUCTURE that can not be removed by coordinate changes since it has non trivial mathematical object called the Ricci tensor (so non trivial curvature!) connected to the distribution of the energy momentum tensor (The famous Einstein Equations) . Everything else as black holes , gravitational waves as physical entities , space-time singularities , etc... are merely speculative (even if at a higher mathematical level ). To prove what I am saying , just consider a non vanishing cosmological constant on Einstein equations . Everything exotic in GR loose sense .Even the interpretation of Gravitational Interaction is lost!.

[@thomasgade226]

@6:45 subject introduction.

[@kdub6593]

Would be a good talk if I believed in gravitational waves.

[@Dr.HarishandEconomics]

Relearning! Feel slightly young..

[@banditrider215]

Pasadena's having a really bad day 😞

[@KostadinIvanov-ik9qs]

💫💥💫💥💫💥💫💥

[@dodatroda]

16 km. What kilometers? Local or from our perspective? You know you can’t just disregard relativity.

[@thomasgade226]

"all neutron stars are the same"? .. the difference between magnetars, pulsars and passive neutron stars was not explained

[@tigertiger1699]

🙏🙏🙏🙏👍

[@ВладимирПарьев]

ВСЕОБЩАЯ СТРУКТУРА ВСЕЛЕННОЙ И СПИРАЛЬ ПАРЬЕВА ПОГУГЛИТЕ

[@nigellbutlerrr2638]

99.99999999% of her message is irrelevant to 99.9999999999999999% of people alive 😮😮. Shocking neglect of real priority 😮