additional Chapter 8 notes to follow my last lecture and complete the Chapter 8 material you are responsible for. While rewriting these notes I more than doubled the number of pages in my class notes by writing larger and hopefully more legibly and including more detail and attempting to explain the ideas clearly.
an amazing story about an engineer who realized that the relativistic Doppler shift was probably going to cause the radio signals from the Huygens probe to be unreadable by the Cassini spacecraft now orbiting Saturn as the probe dropped down through the atmosphere of Saturn's moon Titan
The cosmic microwave background radiation is black body radiation released soon after the big bang when our universe began. For more information, google "cosmic microwave radiation".