|This undated image made available by NASA shows the globular star cluster 47 Tucanae photographed by the Hubble Space Telescope. On Wednesday, Jan. 6, 2016, Rosanne DiStefano of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass., said that clusters of stars on the fringes of our Milky Way galaxy may be home to intelligent life. DiStefano presented her theory at the American Astronomical Society's annual meeting in Kissimmee, Fla. (NASA/ESA/Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration via AP)|
KISSIMMEE, Fla. (AP) —
Densely packed clusters of stars on the fringes of our Milky Way galaxy
may be home to intelligent life. That's the word from an astrophysicist
who's new to probing extraterrestrial territory.
150 globular clusters in our galaxy are old and stable, a plus for any
civilization, said Rosanne Di Stefano of the Harvard-Smithsonian Center
for Astrophysics in Cambridge, Massachusetts. In addition, so many stars
are clumped together it would be easy to hop from one place to another,
keeping an advanced society going.
The first step, she said, is
to locate more planets in these clusters. So far, only one has been
found. The sweet spot would be a habitable zone around a star where life
could flourish, yet dense enough to enhance travel among inhabitants.
Stefano presented her theory Wednesday at the American Astronomical
Society's annual meeting in Kissimmee, Florida. Her paper stood out
among the hundreds of research papers; an AAS official called the
A global cluster can hold a million stars
in a compact ball an average 100 light-years across. This overcrowding
can result in stars elbowing out other stars' planetary systems. Di
Stefano said smaller solar systems would be more apt to last longer; the
planets would orbit closer to their home star and therefore be less of a
target for encroaching neighbors.
Stars in these clusters are so close, communication and travel would be relatively easy for these any space-farers out there.
call it the 'globular cluster opportunity,'" Di Stefano explained in a
statement. "Sending a broadcast between the stars wouldn't take any
longer than a letter from the U.S. to Europe in the 18th century."
Stefano stressed at a news conference that her premise is scientific
conjecture. "I want to make this clear — we don't know," she told
reporters. Nevertheless, the possibility of a long-lived civilization is
fascinating, she noted, so what better place to look than these 10
billion-to-12 billion-year-old global clusters.
"Global clusters are good targets to spend your time on in search of extraterrestrial intelligence," she urged.