Venus differs from Earth in many ways including a lack of internal dynamo driving global magnetosphere to shield potential life from solar and cosmic radiation. However, Venus possesses a dense atmosphere and, in a recent study, planetary scientists conducted simulations of the Venusian atmosphere to determine radiation penetration to the lower cloud layers. Their calculations revealed that the atmospheric thickness provides adequate protection for life at what\u2019s considered Venus\u2019s \u201chabitable zone,\u201d located 40\u201360 km above the surface.<\/p>\n
<\/p>\n Venus, the second planet from the Sun, is often called Earth\u2019s \u201csister planet\u201d because of its comparable size and composition. Yet its environment couldn\u2019t be more different or extreme. It has a thick carbon dioxide atmosphere with sulfuric acid clouds that have created a runaway greenhouse effect, making Venus the solar system\u2019s hottest planet\u2014surface temperatures in excess of 475\u00b0C. The Venusian landscape features volcanic plains, mountains, and canyons under atmospheric pressure exceeding 90 times Earth\u2019s. Despite these inhospitable conditions, Venus remains an object of scientific interest, with researchers studying its geology and atmosphere.<\/p>\n In 2020, scientists found phosphine in Venus\u2019s atmosphere which, on Earth, is mostly made by biological processes or in other words \u2013 living things. This discovery was somewhat unexpected and facilitated a fresh look at Venus as a possible home for life. Surprisingly perhaps, Venus does have a \u201chabitable zone\u201d in its clouds about 40-60 km up, where the temperature and pressure aren\u2019t too different from Earth\u2019s. While the planet\u2019s surface is totally uninhabitable, high up in the atmosphere might actually support some kind of microbial life that\u2019s adapted to acidic conditions. A new piece of research has been exploring if the thick Venusian atmosphere would protect any such life that may have evolved or whether intense radiation bathes its habitable zone.\u00a0<\/p>\n The research, that was led by Luis A. Anchordoqui from the University of New York has revealed surprising results. The team discovered that despite Venus lacking a magnetic field and orbiting closer to the Sun, the radiation levels in its potentially habitable cloud layer are remarkably similar to those at Earth\u2019s surface. Using the AIRES simulation package (AIRshower Extended Simulations \u2013 simulates cascades of secondary particles from incoming high energy radiation) the team generated over a billion simulated cosmic ray showers to analyse particle interactions within Venus\u2019s atmosphere.\u00a0<\/p>\n Their findings show that at equivalent atmospheric depths, particle fluxes on Venus and Earth are nearly identical, with only about 40% higher radiation detected at the uppermost boundary of Venus\u2019s habitable zone. This suggests Venus\u2019s thick atmosphere provides substantial radiation shielding that might be sufficient for potential microbial life.<\/p>\n The research suggests that cosmic radiation wouldn\u2019t significantly hinder life in Venus\u2019s cloud layer. Any potential microorganisms that were there would face radiation levels similar to those on Earth\u2019s surface. On Earth, life has found a way across a wide range of environments that span many kilometres, this is known as its life reservoir. Venus doesn\u2019t have such a great reservoir so if radiation were to sterilise the habitable clouds, there\u2019s no equivalent to Earth\u2019s subsurface biosphere that could eventually recolonise the region. This means life needs to persist continuously in its atmospheric habitat without being able to move to other parts of the planet.<\/p>\n Source : The Venusian Chronicles<\/p>\n![\"\"](\"https:\/\/www.universetoday.com\/wp-content\/uploads\/2022\/12\/Venus-1018x1024-1.jpg\")
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