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#heliosphere

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@waystation 🌌 Saviez-vous que notre système solaire se déplace à 369 km/s (1,33 million de km/h) vers le superamas de Shapley ? 🚀 L'héliosphère, une bulle protectrice générée par le vent solaire, joue un rôle crucial en filtrant 75 % des rayons cosmiques nocifs. 🌠 Elle protège notre planète et influence l'évolution des espèces depuis des millions d'années. 🌍✨ #Astronomie #Héliosphère #SystèmeSolaire #RayonnementsCosmiques #SuperamasDeShapley

The Solar System May Have Passed Through Dense Interstellar Clouds 2 Million Years Ago, Altering Earth’s Climate
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eurekalert.org/news-releases/1 <-- AAAS press release
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doi.org/10.1038/s41550-024-022 <-- shared paper
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“Astrophysicists calculate the likelihood that Earth was exposed to cold, harsh interstellar clouds, a phenomenon not previously considered in geologic climate models…"
#GIS #spatial #mapping #interstellar #clouds #astrophysics #climate #climatechange #atmosphere #geologic #paleoclimate #paleoclimatology #cold #iceage #solarwind #plasmashield #heliosphere #radiation #galacticrays #DNA #model #modeling #interstallarmedium #spacephysics #atmosphericchemistry #solarsystem #spaceweather

The# sun warms the Earth, making it #habitable for people and animals.

But that's not all it does, and it affects a much larger area of #space. The #heliosphere, the area of space influenced by the sun, is over a hundred times larger than the distance from the sun to the Earth.

Earth's atmosphere protects life on the planet from the effects of cosmic radiation, but the heliosphere itself acts as a cosmic shield from most interstellar radiation.

#astronomy
phys.org/news/2024-06-nasa-int

Phys.org · NASA considering an interstellar probe to study the heliosphere, the region of space influenced by the sunPar Sarah A. Spitzer
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#Voyager found that 75% of the #CosmicRays heading our way from #InterstellarSpace 🌌 get filtered out in the #heliosphere’s outer reaches. If the encounter with the next cloud squeezes the heliosphere all the way down to #Earth’s #orbit, life forms would be exposed to an intense #radiation environment that would riddle #DNA 🧬 with mutations. There’s evidence of such an event around the time early #hominids were just beginning to pick up stone tools science.org/content/article/vo

www.science.org‘Voyager on steroids.’ Mission would probe mysterious region beyond our Solar System$3.1 billion probe would seek to reach interstellar space in 16 years