Online Physics 102
The book The First Three Minutes by Steven Weinberg
is an optional, extra-credit part of this course.
There will be an optional, online test that you can take to get the
extra credit. Your grade in this course can only rise if you take
I have made some videos about the early universe.
In the first video I briefly describe Weinberg's book
and then discuss some things that we learned
about dark energy and dark matter after
his book was published.
This six-minute video is
In the second video, I discuss what we think may have happened
in a few instants just before the Big Bang.
This five-minute video also is on
In the third video, I explain that we use the term cosmic inflation
to denote what may have happened just before the Big Bang.
This one-minute video also is on