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Atmospheric pollution could be the sign of advanced extraterrestrial civilization

Atmospheric pollution could be the sign of advanced extraterrestrial civilization
This study is the first time pollution has been examined as a possible technosignature.
Artist’s illustration of a technologically advanced exoplanet. The colors are exaggerated to show the industrial pollution, which otherwise is not visible.
Credits: NASA/Jay Freidlander
Nitrogen dioxide is part of a group of gaseous air pollutants produced due to road traffic and other fossil fuel combustion processes. 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 industrialized civilization. ....

United States , Giada Arney , Ravi Kopparapu , Jacob Haqq Misra , Alpha Centauri , Astrobiology Institute , Signature Of Extraterrestrial Technology , Astrobiology Program , Blue Marble Institute Of Science , Planetary Science Division Research Program , Virtual Planetary Laboratory , Blue Marble Institute , Space Telescope , Deep Field , Sellers Exoplanet Environments Collaboration , Science Division , Planetary Laboratory , Exoplanet System Science , Dioxide Pollution , ஒன்றுபட்டது மாநிலங்களில் , ஜாகோப் ஹக் மிஸ்ரா , ஆல்பா செண்ட Au ரி , கையொப்பம் ஆஃப் வேற்று கிரக தொழில்நுட்பம் , நீலம் பளிங்கு நிறுவனம் ஆஃப் அறிவியல் , கிரகங்கள் அறிவியல் பிரிவு ஆராய்ச்சி ப்ரோக்ர்யாம் , மெய்நிகர் கிரகங்கள் ஆய்வகம் ,

Stellar Flares as an Aid to Life Detection

Stellar Flares as an Aid to Life Detection
by Paul Gilster
on December 23, 2020
The interesting transient associated with Proxima Centauri and monitored by Breakthrough Listen reminds us of a key fact about red dwarf stars and the planets around them. Such stars, especially in their youth, are prone to high flare activity, meaning violent, unpredictable emissions that can deplete atmospheric gases like ozone. Even if the atmosphere survives strong stellar winds, the loss of ozone can lead to high levels of ultraviolet radiation reaching the surface and compromising any life there.
That stellar flares can be dramatic is captured in the image below, showing a filament eruption from the Sun and accompanying solar flares (credit: NASA/GSFC/SDO). As striking as the image is, it depicts activity on an older star less prone to strong flare activity than younger, smaller stars. We’re also fortunate in having the shield offered by Earth’s magnetic field, whi ....

Howard Chen , Proxima Centauri , University Of Colorado At Boulder , Goddard Space Flight Centers Wiessinger , Massachusetts Institute Of Technology , University Of Chicago , Northwestern University , Exoplanet Survey Satellite , Breakthrough Listen , G Class Sun , Nature Astronomy , Massachusetts Institute , Exoplanet System Science , ஹோவர்ட் சென் , பல்கலைக்கழகம் ஆஃப் கொலராடோ இல் கற்பாறை , மாசசூசெட்ஸ் நிறுவனம் ஆஃப் தொழில்நுட்பம் , பல்கலைக்கழகம் ஆஃப் சிகாகோ , வடமேற்கு பல்கலைக்கழகம் , திருப்புமுனை கேளுங்கள் , க் வர்க்கம் சூரியன் , இயற்கை வானியல் , மாசசூசெட்ஸ் நிறுவனம் ,

Robust stellar flares might not prevent life on exoplanets, could facilitate its detection

Robust stellar flares might not prevent life on exoplanets, could facilitate its detection
phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.

United States , University Of Colorado At Boulder , Howard Chen , Erict Wolf , Allison Youngblood , Daniel Horton , Horton Climate Change Research Group , Exoplanet Satellite , Massachusetts Institute Of Technology , University Of Colorado , Goddard Space Flight Centers Wiessinger , Northwestern Weinberg College Of Arts , University Of Chicago , Northwestern University , Massachusetts Institute , Exoplanet System Science , Weinberg College , Climate Change Research Group , Exoplanet Satellite Survey , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆஃப் கொலராடோ இல் கற்பாறை , ஹோவர்ட் சென் , அல்லிசன் இளரத்தம் , டேனியல் ஹார்டன் , ஹார்டன் காலநிலை மாற்றம் ஆராய்ச்சி குழு , மாசசூசெட்ஸ் நிறுவனம் ஆஃப் தொழில்நுட்பம் ,

The upside of volatile space weather

Credit: NASA s Goddard Space Flight Center/S. Wiessinger
Although violent and unpredictable, stellar flares emitted by a planet s host star do not necessarily prevent life from forming, according to a new Northwestern University study.
Emitted by stars, stellar flares are sudden flashes of magnetic imagery. On Earth, the sun s flares sometimes damage satellites and disrupt radio communications. Elsewhere in the universe, robust stellar flares also have the ability to deplete and destroy atmospheric gases, such as ozone. Without the ozone, harmful levels of ultraviolet (UV) radiation can penetrate a planet s atmosphere, thereby diminishing its chances of harboring surface life.
By combining 3D atmospheric chemistry and climate modeling with observed flare data from distant stars, a Northwestern-led team discovered that stellar flares could play an important role in the long-term evolution of a planet s atmosphere and habitability. ....

United States , University Of Colorado At Boulder , Howard Chen , Erict Wolf , Allison Youngblood , Daniel Horton , Horton Climate Change Research Group , Technology Graduate Research Award , Exoplanet Satellite , Massachusetts Institute Of Technology , University Of Colorado , Northwestern Weinberg College Of Arts , University Of Chicago , Northwestern University , Massachusetts Institute , Exoplanet System Science , Weinberg College , Climate Change Research Group , Exoplanet Satellite Survey , Space Science , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆஃப் கொலராடோ இல் கற்பாறை , ஹோவர்ட் சென் , அல்லிசன் இளரத்தம் , டேனியல் ஹார்டன் , ஹார்டன் காலநிலை மாற்றம் ஆராய்ச்சி குழு ,

Upside of volatile space weather

Date Time
Upside of volatile space weather
Although violent and unpredictable, stellar flares emitted by a planet’s host star do not necessarily prevent life from forming, according to a new Northwestern University study.
Emitted by stars, stellar flares are sudden flashes of magnetic energy. On Earth, the sun’s flares sometimes damage satellites and disrupt radio communications. Elsewhere in the universe, however, robust stellar flares also have the ability to deplete and destroy atmospheric gases, such as ozone. The destruction of gases like ozone could allow harmful levels of ultraviolet (UV) radiation to penetrate a planet’s atmosphere, thereby diminishing its chances of harboring surface life. ....

Howard Chen , Erict Wolf , Allison Youngblood , Daniel Horton , Horton Climate Change Research Group , Technology Graduate Research Award , Exoplanet Satellite , University Of Colorado At Boulder , Massachusetts Institute Of Technology , Northwestern Center , Northwestern Weinberg College Of Arts , Research In Astrophysics , University Of Chicago , Northwestern University , Massachusetts Institute , Exoplanet System Science , Weinberg College , Climate Change Research Group , Interdisciplinary Exploration , Exoplanet Satellite Survey , Space Science , ஹோவர்ட் சென் , அல்லிசன் இளரத்தம் , டேனியல் ஹார்டன் , ஹார்டன் காலநிலை மாற்றம் ஆராய்ச்சி குழு , தொழில்நுட்பம் பட்டதாரி ஆராய்ச்சி விருது ,