SETI Program


Bertrand Russell wrote, "There are two possibilities. Maybe we are alone.

Maybe we are not. Both are equally frightening (Jakosky 1)." The question of
life in the universe is one that leaves many in a state of bewilderment. It
becomes even more interesting when it leads to another question – that of
intelligent life in the universe. Finding other intelligent civilizations among
the interstellar space would greatly affect every aspect of our existence.

Conversely, not finding such a civilization would force us to examine the
purpose of our own existence. To help answer the question, astronomers and
scientists set up a program in search for extraterrestrial intelligence. This
program, or SETI, was set up to verify, by observation that extraterrestrial
life does exist. SETI tries to prove this by picking up and analyzing radio
signals by means of satellites and advanced computers (Heidmann 116). The
history of the SETI program is quite interesting. It started back in 1959 with
the help of two famous Cornell University physicists, Guiseppi Cocconi and Phil

Morrison. Both claimed that it would be possible to communicate with other
potential extraterrestrial life in space by the use of techniques used in radio
astronomy (Heidmann 112). Together, they voiced their belief that if other"alien astronomers" elsewhere in the universe possessed radio telescopes,
that it would be possible to converse between the two (Heidmann 112-113). A
young astronomer by the name of Francis Drake agreed with the theories of

Cocconi and Morrison. He proposed building a radio receiver in order to listen
for waves of sound being transmitted through space. It wasn’t until the spring
of 1960 that Drake began his first project of SETI, Ozma. In this project, he
was the first to conduct a search for signals transmitted from other solar
systems. For two tedious months, Drake pointed an eighty-five foot antenna in
the direction of two starts the same age as our sun, Tau Ceti and Epsil. A
single 100Hz-channel receiver scanned nearly 400kHz of bandwidth, for a repeated
series of patterned pulses that would indicate an intelligent message (Heidmann

113-144). Unfortunately, the only sound that came from the speaker was static.

Though no intelligent life was found and project Ozma proved to be nothing but a
disappointment, it actually spurred the interest of others who created a
feasible scientific objective ("Project Ozma"). In the 1960’s the Soviet

Union dominated much of the SETI program. However in the 1970’s NASA’s Ames

Research center, located in California began to take over. After nearly a decade
of study and preliminary research, the NASA headquarters fully funded and
adopted the SETI program. However, five years later Congress ruled the program a
foolish unnecessary scientific endeavor that wasted valuable funding. Congress
then decided to not allow NASA to support SETI and terminated the funding
("History of SETI"). Despite the obstacle, the SETI program was reborn,
forming the SETI Institute. It’s first privately funded project, Project

Phoenix, is the world’s most sensitive and comprehensive search for
extraterrestrial intelligence that listens to radio signals being transmitted
our way. The project focuses on Northern Stars by scanning only those that are
sun-like and are more capable of supporting life (Heidmann 146). The Phoenix

Project is only one of the many projects run for the search of extraterrestrial
intelligence, but is one of the most important. Another highly significant
project in the search for other life would be the project run by the Columbus

Optical SETI Observatory, or COSETI. This project was formed to promote the
optical search for extraterrestrial intelligence. In other words, it seeks to
detect pulsed and continuous wave laser beacon signals in the visible and
infrared spectrums. Until 1998 however, little, or nothing was ever said to
indicate that there might possibly be a sensible optical approach to SETI. Many
researchers believe that extraterrestrials, if they exist, are so sophisticated
that they would use lasers for their communications rather than radio waves. It
is said that by the year 2005 that most SETI activities will be of the optical
kind and that the Hubble Space Telescope (HST) could also be retrofitted for

COSETI. ("The Optical"). One of the more recent projects that we are faced
with today is the SETI@ Home Project. This project allows the general public to
get involved in the search for extraterrestrial intelligence by allowing them to
use their home computers to search for signs of radio signals being transmitted
to Earth from space (Kahney, "A Search"). Supposedly, anyone is able to
participate by running a free program that downloads and analyzes radio
telescope data. The philosophy behind this is that the majority of the SETI
projects in existence today build large computers that analyze the data
collected from the telescopes in real time. Apparently, none of the computers
have the capacity to look at the signals too deeply, and the weakest signals are
missed. SETI programs could never afford the type of computer power need to
analyze both the strongest and weakest signals, so the SETI team came up with
the idea to let individuals at home help them out. The SETI @home project simply
uses a small screen saver program that has the ability to download bits of
information from the SETI @home web site and can analyze that date and report
the data back. (Hipschma, "The Problem"). However, a small glitch has been
found in this process. Volunteers who are downloading and analyzing the
information are wasting CPU cycles by processing data that has already been
scanned. The SETI @home team regrettably announced that due to the overwhelming
response by volunteers, the lack of storage space and manpower, they are
processing the same 115 blocks of information from a two-day period in January.

Truly sincere and apologetic, the team plans to release new data to the public
by May 24th. (Kahney, "A Search"). For decades, radio astronomers have been
hunting for signals from alien civilizations. In an interview with Peter Ward,

Donald Brownlee, authors of the new book "Rare Earth," the two scientists
argue that the emergence of higher life forms would be exceedingly rare. In
order for life to exist many unusual happenings would have to occur for complex
life to exist. Ward presents a lot of factors in his book, that would lead us to
believe that earthlings" are the only complex civilization. First, our solar
system lies in a perfect habitable zone. Anywhere too close to the Milky Way
would have too violent conditions, and too far away would lack the necessary
metals for life. Ward also says Earth lies within a zone of the solar system
where liquid water and sufficient energy exists to sustain life. Seth Shostack,
an astronomer for SETI, argues against Ward’s view in the interview. He states
that humans have only just begun the search, but agrees that many factors must
occur before complex life can exist. However, he argues that these conditions
will happen again, and Earth is not so "rare," as Ward had suggested.

Shostack says the signs of intelligent life have not been found, but that should
not deter the scientists in their search. He claims, "that it is a bit like
sitting in bars if Spain in 1491, arguing whether Christopher Columbus will ever
find a new continent." He continues by saying that, "You can argue that ad
infinitum, and it makes for good conversation. But in the end, you have to build
the ships to do the experiment." Whether for or against the SETI projects, the
search for life in the universe has become recognized as an interest of the
scientific community. Its title is to search for extraterrestrial life and its
purpose is to search for planets in other solar systems and their ability to
shelter life. Unfortunately, the funds for research are often based on the basis
of their scientific research and the results obtained, making it hard to come to
a proper conclusion. While many may have developed their own opinions, the
scientists are the majorities that disagree about life on Earth and on other
planets. However it is the difference of opinions that make the topic the search
for extraterrestrial intelligence interesting. Scientists may reason that the
extraterrestrials do no exist based on his/her research and hypotheses. The
search for radio waves is a prime example because we cannot guarantee success of
finding any signals from outer space, especially if we do not know if they are
even using radio signals. (Jakosky 171-172). Until we actually find a
transmitted radio wave from the outer universe, we can only come to our own
basic conclusions on what we believe. Some may agree that intelligent life
exists among the stars, and others may disagree, claiming we are the only
intelligent life form. Everyone is open to his or her own opinion! Despite what
many critics of the SETI projects claim, many believe that the program must
continue. They believe that at any moment a signal could be detected. If we have
been "listening" that long, why should we stop now? The investment of
manpower and computer technology has been greatly improved in order to
accommodate such research. They believe that since SETI is a program that has
already been internationally established and together SETI is allowing humanity
to embrace technology to be able to communicate with other worlds. Researchers
and supporters of SETI also agree that the discovery of a signal would have
important meaning in the assumptions about our place as humans in the universe (Heidmann

220). Whether we are alone, or whether we have company among us in the universe,
is a mind-boggling question that still remains to be left unanswered. Through
research and scientific study, we one day may be able to determine the answer.

Or perhaps we will never know. It is the fear of the unknown that drives many of
the researches onward into the discovery of extraterrestrial intelligence, and
hopefully one day, all this hard work will pay off!

Bibliography

1. Heidmann, Jean. Extraterrestrial Intelligence. New York: Cambridge

University Press, 1992. 2. Jakosky, Bruce. The Search for Life on Other Planets.

New York: Cambridge University Press, 1998. 3. Kahney, Leander. "A Search for

Intelligent Searchers." Wired News (1999). 29 January 2000 *http://www.nitehawk.com/rasmit/*.

4. Hipschma, Ron. " The Problem – Mountains of Data." How SETI @Home Works
(1999). 29 January 2000 http://www.nitehawk.com/rasmit/. 5. "Project Omar."

SETI Institute. 1999. SETI Institute. 28 January 2000 http://www.seti.org/science/ozma.html.

6. "History of SETI." SETI Institute. 1999. SETI Institute. 29 January 2000
http://www.seti.org/general/history.html. 7. "The Optical SETI Resource for

Planet Earth." The Columbus Optical SETI Observatory. 1999. Columbus

Observatory. 27 January 2000 http://www.coseti.org/. 8. Ward, Peter. Interview
with Lori Stokes. The Debate Over Life Beyond Earth. MSNBC. 10 Feb. 2000.