On parle de fusées, mais le vrai mur vers Mars, c’est la mort silencieuse des radiations.
https://www.clubic.com/actualite-592828-oubliez-la-fusee-voici-le-vrai-probleme-mortel-qui-nous-empeche-d-aller-sur-mars.html
#Space #Science #Astrophysics #MarsExploration #SpaceRadiation
#SpaceRadiation
Radiation ☢️ -triggered #computer errors could lead to an "uncommanded" change in altitude 🛬 so severe that it might exceed "the aircraft's structural capability" 💥. As #computer chips have become smaller, they have also become more vulnerable to bit flips https://www.bbc.com/future/article/20251201-how-cosmic-rays-grounded-thousands-of-aircraft
Intense #solar ☀️ #radiation may corrupt data critical to the functioning of flight ✈️ controls 🕹️ https://www.airbus.com/en/newsroom/press-releases/2025-11-airbus-update-on-a320-family-precautionary-fleet-action
The risks with #SpaceRadiation ☢️ are assigned the highest priority among all risks associated with #SpaceTravel. Active shielding 🛡️ methods, which use #electromagnetic fields to deflect charged particles, can make #DeepSpace 🌌 travel safer and more feasible. Placing the passive shielding before the active shielding is more effective than placing the identical active shielding before the passive shielding of the same thickness https://www.sciencedirect.com/science/article/pii/S2214552423000391
Une manœuvre audacieuse à 600 M km : la NASA a sauvé JunoCam en chauffant l’imageur et sauvé la mission
https://www.lesnumeriques.com/astronomie-conquete-spatiale/le-sauvetage-incroyable-de-l-instrument-de-la-sonde-juno-par-la-nasa-a-des-millions-de-kilometres-n240216.html
#Science #Astrophysics #JunoCam #SpaceRescue #SpaceRadiation
This Superbacteria can Withstand Enough Radiation to Kill a Person
"How #NASA will protect #astronauts from #SpaceRadiation". Spoiler alert : #luggage 🧳 https://www.youtube.com/watch?v=vpNa4u997xA
#HumanSpaceflightHealth #RadiationProtection #Artemis #LunarGateway
#ActiveShielding #SpaceRadiation
"Using active shields that deflect charged particles just like the Earth’s magnetic field does—was first proposed in the 1960s. Today, we’re finally close to making it work."
Ars Technica:
Shields up: New ideas might make active shielding viable
"Active shielding was first proposed in the '60s. We’re finally close to making it work."
https://arstechnica.com/science/2024/03/shields-up-new-ideas-might-make-active-shielding-viable/
“There’re a lot of hazards we don’t know about. In #LEO, we are protected by our #magnetosphere from #SpaceRadiation. If we go outside of that, all of the sudden we have #galactic #CosmicRays ☢️ we have to deal with, we have a lot of #SolarParticles we have to deal with and we also have variable #gravity”. Even a short flight beyond #ISS altitude impacts various aspects of human physiology and #microbiome 🦠 composition. https://asm.org/Articles/2022/October/Out-of-This-World-Microbes-in-Space
#Nature 📆 August 2022 #SpaceRadiation and exposure risk reduction. Shielding performances of potential materials #aluminum (Al), #polyethylene (PE), and carbon fiber reinforced plastic (#CFRP). The effective dose equivalent was reduced by 50% 〽️ https://www.nature.com/articles/s41598-022-17079-1
@christiankoestner So you think #spaceradiation isn't a good point ? https://en.wikipedia.org/wiki/Effects_of_ionizing_radiation_in_spaceflight
Hi everyone!
I am an Assistant Professor in the Dept. of Biology at #HopeCollege (#PUI). I study #Behavior and #Neuroimmunology in mice and humans. My research uses #drugs of abuse (i.e. #morphine and #alcohol) and #space radiation to probe how peripheral #immune responses impact #cognition . I #teach and #mentor #undergraduates (#STEM) how to think about #science and challenge them to question HOW they know content. Here are some other topics/tags that I am fond of: #drugsofabuse #spaceradiation #learningandmemory #adultneurogenesis #microglia #macrophage #mentalhealth
Single Event Upsets: High Energy Particles From Outer Space Flipping Bits
Our world is constantly bombarded by high-energy particles from various sources, and if they hit in just the right spot on the sensitive electronics our modern world is built on, they can start flipping bits. Known as Single Event Upsets (SEU), their effect can range from unnoticeable to catastrophic, and [Veritasium] explores this phenomenon in the video after the break.
The existence of radiation has been known since the late 1800s, but the effect of low-level radiation on electronics was only recognized in the 1970s when trace amounts of radioactive material in the ceramic packaging of Intel DRAM chips started causing errors. The most energetic particles come from outer space and are known as cosmic rays. They originate from supernovas and black holes, and on earth they have been linked to an impossibly fast Super Mario 64 speedrun and a counting error in a Belgian election. It's also possible to see their path using a cloud chamber you can build yourself. There are even research projects that use the camera sensors of smartphones as distributed cosmic ray detectors.
Earth's magnetic field acts as a protective barrier against the majority of these cosmic rays, and there is a measurable increase in radiation as you gain altitude and enter space. In space, serious steps need to be taken to protect spacecraft, and it's for this reason that the Perseverance rover that landed on Mars this year uses a 20-year-old main computer, the PowerPC RAD750. It has a proven track record of radiation resistance and has been used on more than a dozen spacecraft. Astronauts experience cosmic radiation in the form of flashes of light when they close their eyes and protecting their DNA from damaging effects is a serious concern for NASA.
It's impossible to know the true impact of cosmic radiation on our world and even our history. Who knows, one of those impossible-to-replicate software bugs or the inspiration for your latest project might have originated in another galaxy.
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