Active Region 4478 (AR 4478) is a giant sunspot group on the surface of the Sun that was discovered as it rotated forward on the eastern solar limb. This region has quickly gained attention as one of the largest sunspot groups in modern history, on par with the historic region AR 3664 from 2024. Characteristics and Size Enormous scale: The region spans an area significantly larger than planet Earth. It is so large that it can be seen with the naked eye if you wear approved solar eclipse glasses. Magnetic complexity: The sunspot group has been classified with the highest possible magnetic complexity (beta-gamma-delta). This means that its magnetic field lines are tightly entangled. Explosive potential: The complex magnetic structure means that AR 4478 carries enough energy to trigger powerful M-class and X-class solar flares.
Carpe Noctem
A blog about astrophotography and astronomical events.
måndag 29 juni 2026
Noctlicent clouds and owls
A clear summer night with fog over open areas. Noctilucent Clouds are visible in the sky. All around me I heard screams in the trees and saw several owls, Strix aluco owls, chicks screaming for food. I managed to catch one of them flying between the trees.
Noctilucent Clouds are thin clouds of ice crystals that form at an altitude of 85 kilometers in the mesosphere. They are the highest clouds on Earth and are visible during the summer months when they are illuminated from below by the sun which is then below the horizon
lördag 27 juni 2026
Active Sun
A really lovely view through the scope today! A lot of activity at the sun with some great prominences today.
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