Simeis 147：超新星遗迹
2020年12月10日 Simeis 147: Supernova Remnant Image Credit & Copyright: Georges Attard Explanation: It’s easy to get lost following the intricate looping filaments in this detailed image of supernova remnant Simeis 147. Also cataloged as Sharpless 2-240 it goes by the popular nickname, the Sp […]