10.2 Big Bang TheoryBy Sunny and Austin

10.1 The big bang theoryBy the end of section 10.1 you should be able to understand the following:• How Edwin Hubble helped astronomers tracing the

paths of movement backwards• What is cosmic background radiation• That microwave radiation causes cosmic background

radiation

Hubble’s observed the galaxies moving away from one another

Approximately 13.7 billion years ago there was an unimaginably tiny volume of space

space rapidly expanded to an immense size

Big bang theory isn’t the only theory about how the universe formed

Hubble’s Observation

Edwin Powell Hubble

That catastrophic event First described by a Belgian priest and

physicist Georges Lemaitre in 1927 Known as the Big Bang Theory

Two American astronomers Arno Penzias and Robert Wilson made a discovery that is a important piece of evidence

Arno and Robert were monitoring microwave radiation in space

Cosmic Background Radiation

Arno Penzias and Robert Wilson

Arno and Robert kept hearing background noises they made several adjustments

After they found out they were detecting cosmic background radiation

Cosmic Background Radiation (cont.)

This is the radiations that scientists believe is left over the big bang expansion. The red area’s indicate the period of slightly hotter temperatures. The blue area’s are the periods that have slightly cooler temperatures.

Video of Big Bang Theory

Big Bang explosion example

important piece of evidence by the cosmic background explorer(COBE)

The satellite was launched in 1989

Launched by the National Aeronautics

Additional supporting evidence

Satellite by NASA

2001, another spacecraft sent To gather more information about cosmic

background radiation Called Wilkinson Microwave Anistrophy Probe

(WMAP) Was able to get more precise measurement

than have been ever made.

Additional supporting evidence (cont.)

Who first describe the big bang theory, he is also a Belgian priest and physicist?

Who were the two astronomers who made discovery which was the important piece of evidence?

Questions

What does COBE stands for? What does WMAP stands for? Discuss what is big bang theory?

1. Georges Lemaitre2. Arno Penzias and Robert Wilson3. Cosmic Background Explorer4. Wilkson Microwave Anistrophy Probe

Answers

5. Due to the very short time, all the matter and energy expanded in the universe was formed, that catastrophic event was called Big Bang Theory.

Answers cont.

Resourceshttp://en.wikipedia.org/wiki/Edwin_Hubble

http://en.wikipedia.org/wiki/The_Big_Bang_Theoryhttp://www.google.ca/imghp?hl=en&tab=wi

http://www.youtube.com/http://

en.wikipedia.org/wiki/Cosmic_Background_Explorer