New research has revealed that life may exist on Earth. Of course, it wasn't a mystery to begin with, but researchers are now trying to answer an important question: Will the planned LIFE (Large Interferometer for Exoplanets) space mission be able to detect signs of life? did. They discovered that it was possible by using Earth as a test subject.

His proposed LIFE mission would place five small satellites in space near the James Webb Space Telescope. This network of his five satellites acts as his one big telescope that can capture the thermal radiation of exoplanets (planets outside our solar system). The spectrum of light from the radiation can be used to determine the composition of the planet and its atmosphere.

In a study published last week, astrophysical journal, researchers investigated how well the LIFE mission could investigate exoplanets. They decided to treat our planet as if it were an exoplanet and see if they could find “signs of life” based on spectral data.

They used data from NASA's Earth observation satellites to generate emission spectra in the mid-infrared range. This may be how LIFE generates data.

An important consideration they had to address was how the Large Space Telescope would observe Earth from far away in space. Because of the distance, the planet appears like a point with no discernible features. Therefore, the spectral data is an average value depending on the telescope's viewing angle and the time it captures the light.

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They considered three different scenarios: two views from the Earth's poles and one view from the equator. They focused on data recorded in January and July to account for variations that may occur seasonally.

Scientists were able to detect concentrations of the atmospheric gases carbon dioxide, water, ozone, and methane from the infrared spectrum of the planet's atmosphere. They also found data suggesting the presence of liquid water on the Earth's surface. But the evidence was particularly important because ozone and methane are produced by Earth's biosphere.

The findings also suggest that if distant alien civilizations were observing us through telescopes, they would know that the planet is likely habitable. It means.





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