No Dark Matter = Proof of Dark Matter?
You can learn more about CuriosityStream at https://curiositystream.com/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE We’ve been failing to detect dark matter for decades. Finally, the latest failure to detect dark matter may have actually proved its existence. One of these is true: either most of the matter in the universe is invisible and formed of something not explained by modern particle physics OR our understanding of gravity is completely broken. The debate over which is true has raged for decades, but may finally have been resolved in an unlikely way: the proof that dark matter exists, and really is an exotic, unknown substance, may have come from the discovery of two galaxies that appear to have no dark matter at all. Today on Space Time Journal Club we’ll look at the papers that reveal this discovery: Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Need a Refresher to Fully Understand the Holographic Principle? https://www.youtube.com/playlist?list=PLsPUh22kYmNCHVpiXDJyAcRJ8gluQtOJR #darkmatter #astrophysics #spacetime Hosted by Matt O Dowd Written by Matt O Dowd Graphics by Kurtis Ross Directed by Andrew Kornhaber Produced By: Kornhaber Brown The effect of dark matter was first noticed in 1933, when the legendary Swiss astrophysicist Fritz Zwicky noticed that the galaxies in the Coma cluster were moving too quickly to remain gravitationally bound within that cluster. He guessed the presence of “dunkle m aterie” – a dark matter invisible to his telescope but whose gravitational effect held the cluster together. As with many of Zwicky’s predictions – like the existence of neutron stars and gravitational lensing - this wasn’t taken seriously until decades later. The hunt for dark matter began in earnest after the early 70s when Vera Ruben, discovered that the rotation rates of spiral galaxies were too fast given the mass of their visible stars alone. They should throw themselves to pieces spinning that quickly – that is, unless, a gravitational force of unseen origin was holding them together. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang: Anton Lifshits David Nicklas Fabrice Eap Juan Benet Quasar: Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova: Antoine Bruguier chuck zegar Danton Spivey Donal Botkin Edmund Fokschaner John Hofmann Jordan Young Joseph Salomone kkm Mark Heising Matthew Matthew O Connor Thanks to our Patreon Gamma Ray Burst Supporters: Adrien Moyneux Alexander Lazerev Alexey Eromenko Andrewas Nautsch Antonio Ruiz Bradley Jenkins Brandon Labonte Buruk Aregawi Carlo Mogavero Daniel Lyons David Behtala Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Joseph Dillman Joseph Emison Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nicholas Rose Nick Virtue Ratfeast Ryan Jones Scott Gossett Sigurd Ruud Frivik Tim Crookham Tim Stephani Tommy Mogensen Yurii Konovaliuk سلطان الخليفي
