A Halo for Andromeda via NASA https://j.mp/3hPw0nc https://j.mp/2QRtGAo

aki

5年前

A Halo for Andromeda via NASA https://t.co/DvSSHQFQMX pic.twitter.com/TYl9lUfJLE

— Akihiko SHIRAI, Ph.D #VTC20 (@o_ob) September 3, 2020

from Twitter https://twitter.com/o_ob