Another cloud free day in Scotland let me catch almost 9 hours of this huge and lively prom. Taken with my home made 90mm modded Coronado PST and DMK21 camera. Software: CdC, Eqmod, DSSR, AutoStakkert!, Wavesharp, DVS, Shotcut and Gimp.

David Wilson on April 8, 2025 @ Inverness, Scotland

https://spaceweathergallery2.com/indiv_upload.php?upload_id=221951

      • niktemadur@lemmy.world
        0·
        3 months ago

        This is the mechanism that makes Cepheid stars regularly and predictably change intensity

        Doesn’t it also make the Cepheid noticeably swell (then deflate) in circumference? Or does it maintain the same basic size, and it’s just storing magnetic bubbles of hot plasma like a halo, before bursting and releasing all that accumulated material?