Seti project: Nasa should search for aliens again

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Soon astronomers will be looking for traces of intelligent life with a new radio wave observatory. And NASA could also go back to alien search.

Heidelberg Since 1993, the US Space Agency Nasa no longer spend money on the search for extraterrestrial civilizations. But for some time, the search for intelligent life in space is experiencing a boom.

For years, billionaire Yuri Milner’s $ 100 million breakthrough list initiative has driven the search for extraterrestrial messages. And now, for the first time in 25 years, there could be money from the state as well: The US Congress is currently discussing awarding NASA $ 20 million for the search for aliens.

The initiative comes from Lamar S. Smith, chairman of the House Scientific Committee. He says he is a big fan of the SETI (Search for Extraterrestrial Intelligence) project. A first bill of the Republican failed first in the House of Representatives, but a modified version was approved. Now only the Senate must approve the plan, reports the Planetary Society on its website.

The WOW signal recieved from spaceMeanwhile, the Breakthrough List Initiative wants to do the search for so-called technology signatures on a larger scale than before. So far, with the Green Bank Observatory in West Virginia and the Australian Parkes Observatory, some 1,000 star systems have been tapped for whether they emit radio messages or other clearly-identifiable signals, representatives of the initiative reported at a workshop in Houston, Texas.

A model that computes the fraction of the ‘haystack’ that SETI programs have collectively examined

Why haven’t we found evidence of life anywhere but Earth? A trio of astrophysicists has revisited this question by taking a closer look at the “needle in a haystack” analogy. Their analysis involved creating a model to assess the amount of work that has been done searching for extraterrestrial life, the Search for Extra-terrestrial Intelligence (SETI) project, compared to how much is required before scientists can rule out the possibility that there is none. Jason Wright, Shubham Kanodia and Emily Lubar have written a paper describing their efforts and uploaded it to the arXiv preprint server.

While it might seem to people who are not space scientists that humans have done an awful lot of work searching for signs of life on other worlds, the truth is quite the opposite. Back in 2010, well-known space scientist Jill Tarter compared the search thus far to peering at a glass of water looking for fish while standing next to the still unexplored ocean. In their new effort, Wright, Kanodia and Lubar have created a model that they believe better frames the effort to date. Their model uses inputs such as the number of searches conducted and amount of space covered, and compares them to estimates of the size and intricacy of the galaxy and universe beyond.

In their work, the researchers focus on the more traditional types of searching methods—using telescopes and other advanced equipment to study signals that arrive here on Earth from other places. This, of course, rules out the possibility of extraterrestrial life already residing here on Earth or unexplained phenomena such as UFOs.

The researchers have found Tarter’s analogy to be quite close to reality, though they would bump the sample size from a glass to a swimming pool. But they also note that another famous analogy might need modification. They suggest the search for extraterrestrial life might be more akin to searching for any one of multiple needles in a proverbial haystack, rather than just one. But they also note that all we really need to find is just the one.

Read more at: https://phys.org/news/2018-09-fraction-haystack-seti.html#jCp

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