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How do electrons close to Earth reach almost the speed of light?

E-Mail IMAGE: The contours in color show the intensities of the radiation belts. Grey lines show the trajectories of the relativistic electrons in the radiation belts. Concentric circular lines show the trajectory. view more Credit: Ingo Michaelis and Yuri Shprits, GFZ New study found that electrons can reach ultra-relativistic energies for very special conditions in the magnetosphere when space is devoid of plasma. Recent measurements from NASA s Van Allen Probes spacecraft showed that electrons can reach ultra-relativistic energies flying at almost the speed of light. Hayley Allison, Yuri Shprits and collaborators from the German Research Centre for Geosciences have revealed under which conditions such strong accelerations occur. They had already demonstrated in 2020 that during solar storm plasma waves play a crucial role for that. However, it was previously unclear why such high electron energies are not achieved in all solar storms. In the journal

Yuri shpritsVan allenHayley allisonProfessor at university of potsdamGerman research centre for geosciencesAllen probesGerman research centreScience advancesSection spaceவேன் ஆலன்ஹேலி அல்லிசன்ப்ரொஃபெஸர் இல் பல்கலைக்கழகம் ஆஃப் பாட்ஸ்‌ட்யாம்ஜெர்மன் ஆராய்ச்சி மையம் க்கு புவி அறிவியல்ஜெர்மன் ஆராய்ச்சி மையம்பிரிவு இடம்

NASA picks up signal from one of Jupiter s moons in mystery space bombshell

NASA picks up signal from one of Jupiter s moons in mystery space bombshell
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United statesYuri shpritsPatrick wigginsDaily starஒன்றுபட்டது மாநிலங்களில்பேட்ரிக் விக்கின்ஸ்தினசரி நட்சத்திரம்

3 Questions: Rona Oran and Benjamin Weiss on ancient moon s missing magnetism

Massachusetts Institute of Technology Today, the moon lacks a global magnetic field, but this wasn’t always the case. Spacecraft measurements of the moon’s crust and lunar rocks retrieved by the Apollo missions contain remnant magnetization that formed 4 to 3.5 billion years ago in a magnetic field comparable in strength to that of the Earth. Scientists have argued that the source of this was a dynamo – a magnetic field generated by the moon’s churning, molten, metal core. However, research indicates that the moon’s suspected small core may not have been able to generate enough energy to sustain the ancient magnetic field that planetary scientists have inferred from in its rocks.

United statesRona oranYuri shpritsKatarina miljkoviBen weissDepartment of earthGerman research centre for geosciencesSolar system workings programPlanetary sciencesUniversity of michiganCurtin universitySkoltech faculty development programSolar system exploration virtual instituteScience advancesResearch centreSystem workings program