Globular Star Cluster 47 Tuc via NASA https://j.mp/34nD9qr https://j.mp/34nCfdC

aki

5年前

Globular Star Cluster 47 Tuc via NASA https://t.co/feTpiY3sjY pic.twitter.com/F4dmvoJ5IR

— Akihiko SHIRAI, Ph.D #VTC20 (@o_ob) October 24, 2020

from Twitter https://twitter.com/o_ob