Life in the Universe
Prof. Scott Gaudi
Enrico Fermi (1901-1954)
The Fermi Paradox
What is the Fermi Paradox?
Colonization Happens Rapidly
Solutions to the Fermi Paradox
UFOs Are Real?
Civilizations have colonized the Galaxy
Civilizations have not colonized the Galaxy
We Are Alone
The Rare Earth Hypothesis
The rise of complex, intelligent life on Earth required an extremely unlikely combination of events and circumstances.
Without the moon our spin-axis would wander
Implications of Various Solutions
See A Note about Graphics to learn why the graphics shown in the lectures are generally not reproduced with these notes.
[ Return to the Astronomy 141 Main Page | Unit 5 Page ]
Copyright © Scott Gaudi All Rights Reserved.