M2 9: Wings of a Butterfly Nebula via NASA https://j.mp/3mgkjbU https://j.mp/33npMFh

aki

5年前

M2 9: Wings of a Butterfly Nebula via NASA https://t.co/CaevmFEMrm pic.twitter.com/Fam3Bk9fF9

— Akihiko SHIRAI, Ph.D #VTC20 (@o_ob) September 13, 2020

from Twitter https://twitter.com/o_ob