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1-min read

Artificial Intelligence May Help Predict Alien Life

Researchers from Britain's Plymouth University classified planets into five types, based on whether they are most like the present-day Earth, the early Earth, Mars, Venus or Saturn's moon Titan, estimating a probability of life in each case.

IANS

Updated:April 6, 2018, 9:58 AM IST
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Artificial Intelligence May Help Predict Alien Life
Artificial Intelligence May Help Predict Alien Life (photo for representation, image: AFP PHOTO / Toru YAMANAKA)
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Artificial Intelligence (AI) could help astronomers predict the probability of life on other planets, according to a new study. Using artificial neural networks (ANNs) researchers from Britain's Plymouth University classified planets into five types, based on whether they are most like the present-day Earth, the early Earth, Mars, Venus or Saturn's moon Titan, estimating a probability of life in each case.

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All five of these objects are rocky bodies known to have atmospheres and are among the most potentially habitable objects in the Solar System. "We're currently interested in these ANNs for prioritising exploration for a hypothetical, intelligent, interstellar spacecraft scanning an exoplanet system at range," said Christopher Bishop from the varsity.

"We're also looking at the use of large area, deployable, planar Fresnel antennas to get data back to Earth from an interstellar probe at large distances. This would be needed if the technology is used in robotic spacecraft in the future," Bishop added. ANNs are systems that attempt to replicate the way the human brain learns.

Atmospheric observations -- known as spectra -- of the five Solar System bodies are presented as inputs to the network, which is then asked to classify them in terms of the planetary type.

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As life is currently known only to exist on Earth, the classification uses a "probability of life" metric which is based on the relatively well-understood atmospheric and orbital properties of the five target types. "Given the results so far, this method may prove to be extremely useful for categorising different types of exoplanets using results from ground-based and near-Earth observatories," said Angelo Cangelosi, the supervisor of the project.

The technique may also be ideally suited to selecting targets for future observations, given the increase in spectral detail expected from upcoming space missions such European Space Agency's Ariel Space Mission and NASA's James Webb Space Telescope.

The work was presented at the European Week of Astronomy and Space Science (EWASS) in Liverpool.

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