Globular clusters: A possible site for intelligent life forms
The search for extraterrestrial life has led some scientists to examine globular clusters.
At a meeting of astronomers, Rosanne Di Stefano with the Harvard-Smithsonian Center for Astrophysics presented the argument that advanced life could potentially be found within such clusters.
According to Discovery News, "Globular clusters typically contain about 1 million stars in a region just 100 light years across."
The Milky Way, for example, has been found to contain about 150 of these clusters.
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And while these stars tend to be very old—many more than twice the age of our sun—the challenge is that they tend to lack the amount of heavy elements that typically form a planet and sustain life.
However, Di Stefano counters that exoplanets have been linked to stars that are relatively lighter in these components.
In fact, the longevity of these globular clusters could mean that life has time to develop into an intelligent form.
The close proximity of the stars also presents the opportunity for easier communication and even travel among these entities.
That said, finding planets in these clusters will likely be difficult considering their distance from Earth.