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Originally posted by Madara
The universe is probably teaming with life.
To me, people who insist that there is no life out there are idiotic.
Wherever there is light there is life,
if there are 1 trillion stars in our galaxy alone..
now...we can barely see outside our galaxy...but we do know there are trillions of trillions of other galaxies out there.....
Originally posted by Xtrozero
...As I always have said, aliens would either have always been a part of us from day one of humans’ existence or we are very alone by the spear odds of two species ever meeting in the vastness of space.
Originally posted by yeti101
reply to post by Silicis n Volvo
if there are 1 trillion stars in our galaxy alone..
sorry there isnt estimates range from 100 billion- 400 billion. Most astronomy papers recently use the 100 billion figure.
now...we can barely see outside our galaxy...but we do know there are trillions of trillions of other galaxies out there.....
i dont know why poeple go on about other galaxies. how are we going to detect life there? or send a probe there? or communicate with another civilization who lives there? also the upper estimate ive seen is 300 billion galaxies. not trillions.
Mr sasselov has misled everyone with this "100 million" potentially habitable planet number. He doesnt make it clear if he's scaling his stats to the whole galaxy and for all types of stars but i think he is.
We can cut that number by 80% becuase 80% of stars reside in hostile areas of our galaxy. They are outside the GHZ (galactic habitable zone) so that brings us down to 20 million. Now M stars are problematic for complex life so if we take a conservative approach we should only count G type stars. The current estimate is 1 out of 20 stars in the GHZ are G type like sol.
Which brings us down to 1 million potentially habitable planets in our galaxy.
Not so impressive as 100 million is it? but a damn site more realistic.
Still his presentation was so vague and incompetent we dont really know what he was talking about. Even i was confused and im into this stuff. If he was talking 100 million potential planets in the GHZ only around G type stars that would be pretty cool but i dont think he was.
[edit on 6-8-2010 by yeti101]
Originally posted by ATSZOMBIE
Out of proportion? 100 million habitable planets potential for life is HUGE obviously, its not out of proportion.
Originally posted by Chadwickus
reply to post by ATSZOMBIE
Way to blow something out of proportion.
It's a very interesting and exciting article.
your commentary, not so much.