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Comet C/2025 F2 SWAN

…image data from the Solar Wind ANisotropies (SWAN) camera on the sun-staring SOHO spacecraft. Comet SWAN’s coma, its greenish color a signature of diatomic carbon molecules fluorescing in sunlight, is…

Comet Lemmon’s Wandering Tail

…is a blue hued ion tail for Comet C/2025 A6 (Lemmon) that is not only impressively intricate but takes some unusual turns. This long-duration composite image taken from Alfacar, Spain…

Comet Lemmon and the Milky Way

Copyright: Lin Zixuan (Tsinghua U.) What did Comet Lemmon look like when it was at its best? One example is pictured here, featuring three celestial spectacles all at different distances….

Tails of Comet Wierzchoś

Copyright: José J. Chambó; Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II) Some comets are regular guests of our solar neighborhood; others come by only once, never to return. We…