Does Dark Matter theory really help scientists discover more about space? Meet one of the world’s biggest sceptics and hear his views on why he thinks dark matter doesn’t exist. Great clip from BBC show ‘Most of Our Universe is Missing’.
Duration : 0:2:48
http://www.pbs.org/nova/sciencenow We can’t see dark matter, and some skeptics doubt its existence, but many scientists think it makes up 20-some percent of our universe. Astronomer Doug Clowe explains how the Bullet Cluster, a group of galaxies billions of light years away, may shed some light on this mysterious stuff.
Don’t miss the new season of NOVA scienceNOW, airing every Wednesday at 9pm starting June 25 on PBS. Watch past episodes of the program, try out interactives, and more on our Web site: http://www.pbs.org/nova/sciencenow
Duration : 0:4:38
Lecture 1 of Leonard Susskind’s Modern Physics concentrating on Cosmology. Recorded January 13, 2009 at Stanford University.
This Stanford Continuing Studies course is the fifth of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. The topics covered in this course focus on classical mechanics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University.
Stanford University:
http://www.stanford.edu
Stanford Continuing Studies:
http://continuingstudies.stanford.edu/
About Leonard Susskind:
http://www.stanford.edu/dept/physics/people/faculty/susskind_leonard.html
Stanford University Channel on YouTube:
http://www.youtube.com/stanford
Duration : 1:43:3