SETI
support
There was an article in the Charlotte Observer about a controversy
concerning the SETI program (Search for Extraterrestrial Intelligence). Should we keep on just passively listening to
the universe for some signal from another intelligent life form, or should we
actively beam our own signals hoping to get somebody’s attention out
there? Do we seek wisdom from those more
advanced? Do we risk alerting the vicious
Klingons to our presence? The debate is
lively.
Are we alone in the universe? is certainly
among the Top Ten Ultimate Questions.
Many think we cannot possibly be alone, based on sheer overwhelming statistical
probability, and given the obvious universal similarities of the solar system
formation processes, which inevitably create uncountable systems much like our
own, wheeling around other stars.
But what good would incoming radio signals have been to us over well
more than 99 percent of humankind’s radio-receiver-less history on this
planet? Incoming messages would have
also gone utterly unnoticed over the millions of years the dinosaurs ruled the
earth before us. So any of our signals
that happen to reach other planets inhabited by similar primitive creatures
will also go unnoticed.
To either listen or transmit with any practicality, we’ll have to target
planets that lie within reasonable reach of radio waves, which travel at light
speed. The vast majority of stars are thousands, millions, and billions of
light years distant. (A single light year is six trillion miles.) Our earth will be long gone, or at least
long-since uninhabitable by the time any signals we send can even reach most of
those stars. Our sun only has a life
expectancy of some four billion more years, so systems lying any more than half
that distance away (two billion light years) have no chance of receiving our
signals and responding in time for anybody left on earth to hear them. And our signals must reach an alien
civilization at a moment in their likely equally lengthy history when they’ve
developed the ability to not only receive but also to interpret those
signals. The odds are long.
But the unarguable, dead-certain fact remains that if we don’t find a
young habitable planet circling a young star that we can reach one day, even if
each colonizing voyage spans generations*, then everything we’ve worked and
suffered to achieve, all our myriad accomplishments—our books and paintings and
philosophies and inventions and self-knowledge—will be utterly lost to the rest
of the inhabited universe. In that case
it will be highly probable nobody out there will ever know we even existed.
Viewed in that light, what more important effort could there be to help
ensure the far future of mankind than a vigorous fledgling space program in all
its aspects, including SETI?
As writers, we can speak for and encourage that effort.
Many decry the cost of venturing
into space.
I submit that the cost is a pittance compared with what we spend—and
what we waste—in so many other areas.
The news recently mentioned, sort of in passing, that the Pentagon in
its ponderous wisdom has apparently misplaced a half-billion dollars in
advanced weaponry in, of all places, Yemen, that hotbed of terrorism. To put that in perspective, a half-billion
dollars in $100 bills would weigh five tons, a pretty good load for a common
dump truck, but only another line item in the massive Federal budget.
If we can afford that kind of cavalier (not to mention dangerous) waste,
surly we can afford to fund a program that at least has the glimmer of a chance
to elevate and perhaps even to ultimately perpetuate our species.
But wait, even as I write this, there’s good news that the Russian
billionaire Yuri Milner has just donated $100 million to UC Berkeley to fund
SETI for a decade, broadening the search over much more of the sky and over a
wider swath of the electromagnetic spectrum, looking for life among the closest
stars to us under a new breakthrough initiative that will be open to the
public. Any of us will be able to track
the data via a screen saver called SETI@home.
SETI has more than six million followers already.
Some ten percent of the suns in our own Milky Way galaxy are now thought
to have earth-like planets, of similar size to our sphere and in an orbit where
water is liquid, so the odds of finding other life out there are looking better
than ever before.
Famed cosmologist Stephen Hawking was on hand to take part in the
generous funding announcement. He said
of the revitalized search, “We are life.
We are intelligent. We must know.”
Phil
*I saw an excellent IMAX documentary
about the almost impossibly long and dangerous annual migratory journey of the
fragile monarch butterfly, which spans thousands of miles and three of their
butterfly generations. Maybe we’ll take
a lesson from this tiny creature when we finally launch some courageous
pioneers to the stars.