Type III radio bursts from the sun are signatures of energetic (∼1–100 keV) electrons, accelerated at the reconnection sites, propagating upward through the corona into the interplanetary medium along open magnetic field lines. The emission mechanism of the bursts is widely believed to be due to coherent plasma processes. The bursts are observed typically in the frequency range ≈1GHz–10kHz, which corresponds…
Tag: Corona
‘Solar Orbiter’ Delivers Closest Pictures Ever Taken of the Sun
“A European and NASA spacecraft has snapped the closest pictures ever taken of the sun,” reports the Associated Press, “revealing countless little ‘campfires” flaring everywhere. Scientists on Thursday released the first images taken by Solar Orbiter, launched from Cape Canaveral in February. The orbiter was about 48 million miles from the sun — about halfway between Earth and the sun —…
Mysterious force destroys monster black hole’s ring of plasma
Telescopes all over the world watched a bright flash light up space around a distant, supermassive black hole. And then, within hours, it was gone. Source: https://www.livescience.com/black-hole-corona-killer.html
Venus, Long-Thought Dormant, Shows Signs of Volcanic Activity
Scientists have identified 37 volcanic structures on Venus that appear to be recently active — and probably still are today — painting the picture of a geologically dynamic planet and not a dormant world as long thought. NBC News reports: The research focused on ring-like structures called coronae, caused by an upwelling of hot rock from deep within the planet’s interior,…