Did NASA Find aliens on JUPITER
On Earth, most of the nitrogen dioxide is emitted from human activity -- combustion processes such as vehicle emissions and fossil-fueled power plants,” said Ravi Kopparapu of NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “In the lower atmosphere (about 10 to 15 kilometers or around 6.2 to 9.3 miles), NO2 from human activities dominate compared to non-human sources. Therefore, observing NO2 on a habitable planet could potentially indicate the presence of an industrialized civilization.” Kopparapu is lead author of a paper on this research accepted by the Astrophysical Journal and published online Tuesday, February 9 in arXiv.
Astronomers have found over 4,000 planets orbiting other stars to date. Some might have conditions suitable for life as we know it, and on some of these habitable worlds, life may have evolved to the point where it produces a technological civilization. Since planets around other stars (exoplanets) are so far away, scientists cannot look for signs of life or civilization by sending spacecraft to these distant worlds. Instead, they must use powerful telescopes to see what's inside the atmospheres of exoplanets.
A possible indication of life, or biosignature, could be a combination of gases like oxygen and methane in the atmosphere. Similarly, a sign of technology on an exoplanet, called a technosignature, could be what’s considered pollution here on Earth -- the presence of a gas that’s released as a byproduct of a widespread industrial process, such as NO2.
This study is the first time NO2 has been examined as a possible technosignature.
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