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.
Physicist Patricia Burchat sheds light on two basic ingredients of our universe: dark matter and dark energy. Comprising 96% of the universe between them, they can’t be directly measured, but their influence is immense.
La física Patricia Burchat nos muestra dos de los ingredientes básicos de nuestro universo: La materia oscura y la energía oscura. Entre ambas forman el 96% del universo, no se pueden medir de manera directa pero su influencia es inmensa. Sigue leyendo