CARL SAGAN

ABOUT SAGAN

• After graduating, went to University of Chicago
• Was in Ryerson Astronomical Society
• After being a professor at Cornell University,
• Sagan became an advisor at NASA
• He suited astronauts before their flights

SAGAN EARNED:

• A bachelor in physics
• A master of science in physics
• PhD in astronomy and astrophysics

THE BIG IDEA

• While building robotic spacecrafts that explored
• the solar system, Sagan then got an idea.

EXTRATERRESTRIAL LIFE

• He came up with the idea of creating
• an unalterable, universal message for
• extraterrestrial life to find in the solar system.

OTHER CONTRIBUTIONS

• Discovering the high temperatures of the surface of Venus
• Hypothesizing about Saturn's moon, Titan
• Watching seasonal changes on Mars
• Looking at atmospheres of Venus and Jupiter
• Predicting global warming was 'a growing, man-made danger'

OTHER CONTRIBUTIONS

• Exploring the clouds of Jupiter in search of life
• because the planet's dense atmosphere was rich
• in organic molecules
• Studied color variations on Mars

SO,

SAGAN BELIEVED SO

SAGAN THOUGHT:

• The universe is so big,
• there has to be another kind of life
• form out there somewhere

STEPHEN HAWKING

• Hawking also had said after Sagan: "in
• a universe with 100 billion galaxies, each
• containing hundreds of millions of stars,
• it is unlikely that earth is the only place
• where life is evolved."

SEPTEMBER 19TH, 2013

• A team of British astronomers sent
• a balloon up 27km into our stratosphere
• and it came back down with biological
• organisms they believe could only originate
• from space.