![]() NOAA analysts have modeled the CME and determined that it will not hit Earth. It was hurled into space by a magnetic filament eruption in the sun's southern hemisphere ( movie) while the comet was still far away. Most, measuring less than a few meters across, are too small to see, but occasionally a bigger fragment like this one attracts attention. Kreutz fragments pass by the sun and disintegrate almost every day SOHO has seen thousands of them. ![]() They get their name from German astronomer Heinrich Kreutz, who studied them in detail in the 19th century. Kreutz sungrazers are fragments from the breakup of a single giant comet many centuries ago. 15th, SOHO coronagraohs caught a Kreutz sungrazer diving into the sun just as a bright CME was leaving. SUNDIVING COMET AND CME (UPDATED): The sun just swallowed a comet. Did you photograph Lucy? Submit your pictures here. So far no sightings have been reported, despite the spacecraft being as bright as a 1st magnitude star over Australia and visible through telescopes in the western USA. LUCY FLYBY UPDATE: NASA's Lucy spacecraft flew past Earth today so close that it skimmed the upper atmosphere. ![]() Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays. Credit: SDO/HMIĬosmic Rays Solar Cycle 25 is beginning, and this is reflected in the number of cosmic rays entering Earth's atmosphere. ![]() None of these sunspots poses a threat for strong solar flares. ![]()
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