Thank you for the quick reply. I am an old geezer of 75 and have fallen in love with physics. A little too late for a degree as I already have one in geology but the subject does not soar like cosmology. My wife hit me with the question during the last lesson and will be thrilled with the...
Homework Statement
I am taking a course from the Teaching Company called the "Physics of History". Two statements by the teacher seem in conflict to me as an amateur.
1. The average temperature of the cosmos is about 3 degrees K.
2. Most of the material in the cosmos is in the form of...