3.31 Astro 1 Section 1 Professor Brandt

3.31 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

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Astro 1 Section 1 Professor Brandt Wednesday March 31th 1999 Announcements: Lecture notes: Class 32 In next 2 classes we will talk about two other main pieces of evidence for the Big Bang - from very early Universe. Cosmic Microwave Background - 300 000 years after Big Bang. The very early Universe was hot and smooth. A soup of plasma - free electrons and protons. Stars planets galaxies had not yet formed. We have also talked about how when you look out into space you also look back in time. About 2 million years for Andromeda Galaxy. About 10 billion years for most distant quasars. A natural question then arises. If we can look back even further past the quasars can we see the very early Universe when it was hot and smooth? The answer is Yes! In the mid 1960s people accidentally discovered radiation that was emitted when the Universe was just 300 000 years old. At the time the Universe was hot (3000K) almost as hot as the Sun's surface. Smooth to 1 part in about 100 000. Two radio astronomers were working with a radio telescope at Bell Laboratories
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This note was uploaded on 02/20/2008 for the course ASTRO 1 taught by Professor Brandt during the Spring '99 term at Pennsylvania State University, University Park.

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3.31 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

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