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There Are 100 Million Habitable Planets In The Milky Way – Scientists
6/1/2014 10:51:34 PM
A new study suggests that the Milky Way could host 100 million planets with complex life, leaving no lack of choice for astronomers to look for organisms beyond Earth. The challenge is, however, that these worlds might be too far away from us to do much yet.
"On the one hand, it seems highly unlikely that we are alone," stated Louis Irwin, lead author of the study and professor emeritus at the University of Texas at El Paso. "On the other hand, we are likely so far away from life at our level of complexity, that a meeting with such alien forms is extremely improbable for the foreseeable future."
The figure came from studying a list of more than 1,000 exoplanets for metrics such as their density, temperature, chemistry, age and distance from the parent star. From this, Irwin's team formulated a "biological complexity index" that ranges between 0 and 1.0. The index is rated on "the number and degree of characteristics assumed to be important for supporting multiple forms of multicellular life," the research team stated.
Read more about the research in the journal Challenges.
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