Ponente: Francisco De Zela (Sección Física PUCP) La conferencia ha sido motivada por cumplirse cien años de la publicación de la relatividad general. Tendrá un carácter introductorio, tratando de situar el aporte de Einstein en el contexto de épocas pasadas, así como de la actual. Dicho aporte trasciende el ámbito de teorías gravitatorias, proyectándose a una buena parte de la física teórica.
Published on Jul 15, 2015
Dark energy is cosmology’s biggest mystery—an anti-gravitational force that confounds the conventional laws of physics. It makes up more than two-thirds of the cosmos, but science is still grappling to explain what dark energy actually is. In this program, top physicists search for clues to this mystery in both the earliest moments of the universe and far into the future of the cosmos.
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PARTICIPANTS: Josh Frieman, Priyamvada Natarajan, Adam Riess, Jan Tauber, Neil Turok
Original Program Date: 05/28/2015
Lawrence Krauss’s introduction. 00:15
The geometry of space. 4:28
How to create the clumps from inflation? 8:50
Einsteins equations. 13:23
Participant Introductions. 17:50
What does expansion mean? 20:00
what have we learned since the cosmological constant? 29:20
What do the observations show? 37:00
There is no evidence of gravitational waves. 43:00
What is the useless useful? 46:04
Leading the hunt for dark energy. 53:51
Proving a cosmological constant. 1:02:00
Will we be able to measure that dark energy as the cosmological constant in this lifetime? 1:07:01
The history of the universe and forming a black hole. 1:16:59
Category
Science & Technology
Published on Aug 2, 2012
In 1998 two teams traced back the expansion of the universe over billions of years and discovered that it was accelerating. It was a startling discovery that suggests that more than 70 per cent of the cosmos is contained in a previously unknown form of matter, called Dark Energy.
En 1998, dos equipos rastrearon la expansión del universo durante miles de millones de años y descubrieron que se estaba acelerando. Fue un descubrimiento sorprendente que sugiere que más del 70 por ciento del cosmos está contenido en una forma hasta ahora desconocida de materia, llamada energía oscura.
Speaking at the University of Sydney, acclaimed physicist and cosmologist Sean Carroll gives an entertaining and thought-provoking talk about the nature of time, the origin of entropy and how what happened before the Big Bang might be responsible for the arrow of time we observe today. Sean Carroll is a theoretical physicist at the California Institute of Technology. He received his Ph.D. in 1993 from Harvard University and has previously worked at MIT. He is the author several acclaimed books.
CHAST 2009 Templeton Lecture, University of Sydney Source:
University of Sydney
Duration: 28m 58s
El origen del universo y la flecha del tiempo. Sean Carroll
Al hablar en la Universidad de Sydney, el físico y cosmólogo aclamado Sean Carroll da una charla entretenida y estimulante sobre la naturaleza del tiempo, el origen de la entropía y cómo lo que pasó antes del Big Bang podría ser responsable de la flecha del tiempo que observamos hoy . Sean Carroll es un físico teórico en el Instituto de Tecnología de California. Recibió su Ph.D. en 1993 la Universidad de Harvard y ha trabajado anteriormente en el MIT. Él es el aclamado autor de varios libros.
CHAST 2009 Templeton Lecture, University of Sydney Source:
University of Sydney
Duration: 28m 58s Sigue leyendo
At Serious Play 2008, astrophysicist George Smoot shows stunning new images from deep-space surveys, and prods us to ponder how the cosmos — with its giant webs of dark matter and mysterious gaping voids — got built this way.
En “Serious Play 2008”, el astrofísico George Smoot muestra impresionantes nuevas imágenes de estudios del espacio lejano, y nos anima a reflexionar cómo es que el cosmos, con sus gigantes redes de materia oscura y misteriosos vacíos traslapados, se construyó de esta manera. Sigue leyendo