Extraterrestrial Life Debate
Is there Extraterrestrial Intelligent life? 

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Is there Extraterrestrial Intelligent life?

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PRO 1

An average galaxy contains a hundred billion stars. We suspect there are perhaps a hundred billion galaxies in the universe. Although this is an educated guess (only 1 billion galaxies are known), even being off by several factors of ten still means that there is a vast supply of stars out there for life..

 

PRO 2

In 1995, a massive object was found to be orbiting the star 51 Pegasi. Since that discovery, 24 planets have been discovered orbiting other stars. In 4 short years we've discovered more extrasolar planetary bodies than exist in our own solar system! 

 

PRO 3

Planetary systems seem common. This view is further bolstered by Hubble Space Telescope images of the Orion nebula that show many disc-shaped dust clouds swirling around young stars.

 

 

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