Contrary to previous claims, SETI researchers believe that interstellar travel is possible, but unlikely to involve life forms. (credit: SETI Institute)

Letter: response to “SETI politics”

by Seth Shostak
Monday, September 12, 2005

While I am gratified that Gregory Anderson has addressed the matter of “SETI politics” in his recent article (see “SETI politics”, The Space Review, September 6, 2005), I believe that some of his facts are wrong and his arguments skewed.

His take on the respectability of SETI in the scientific community is unduly pessimistic. While there are certainly individual scientists who are doubtful about the chances of a SETI detection, SETI has been specifically called out as a legitimate and worthy endeavor by the astronomical community in decadal reviews. This is an endorsement of considerable weight. Anderson also writes—erroneously—that “NASA started a modest SETI program in 1992,” but in fact the NASA SETI program dates from the mid-1970s. It was a long-term, but modest program that developed both observing strategies and the requisite technology.

I’m not quite sure what the point is, but Anderson writes “Perhaps logically, the time of SETI has coincided with the UFO era…” This may be true if one speaks of geological time, but Roswell (the only UFO incident named by Anderson) was 1947, and the first SETI observations were a dozen years later.

These are all technical nits. Of greater consequence is Mr. Anderson’s mis-characterization of my opinion on interstellar travel, on which he writes “Shostak argues that interstellar travel will always be so expensive that societies will always elect to explore deep space through some version of SETI.” This is not my view at all. I have no idea whether interstellar travel for exploration will happen sooner or later, but I’m rather optimistic that it will eventually happen. I think that interstellar travel for biological beings is a long shot frankly, but if you’re either willing to send telesensing apparatus, or just spend a long time getting there, then going to the stars is possible, and at some level of technology, feasible.

I think, however, it is worth noting that our ability to build good telesensing equipment is far outpacing our efforts at making enormously faster rockets. Ergo, I suspect that we will send equipment, rather than ourselves, for any direct interstellar exploration. That’s my view of things. Mr. Anderson thinks otherwise, noting for example that “Long-term economics and trade may be another driver [for interstellar travel]; establishing English colonies in North America led to extraordinary economic advances…” I respectfully point out that such examples all involved members of the same species, and even then, “trade” was not the driver. The Europeans did not wish to trade with the Aztecs (what did the Aztecs import?) but merely put them to work in silver mines. And the Mesoamerican cultures are estimated to have been only 500 years behind their European counterparts in terms of technical development. The difference between interstellar societies will be far greater.

Mr. Anderson’s true agenda is to plead that SETI researchers should be accepting of “Little Green Men zipping through spacetime in flying saucers.” I would be happy to accept this idea if there were only convincing proof. When discussing alien UFOs, it is a common canard to argue that the SETI community’s skepticism is simply due to their failure to be open to the idea. That’s wrong. Their skepticism is rooted in the lack of good evidence.

Dr. Seth Shostak is the Senior Astronomer at the SETI Institute.

Home