NGC 7822：宇宙级的问号
2021年10月13日 NGC 7822: Cosmic Question Mark Image Credit & Copyright: Yizhou Zhang Explanation: It may look like a huge cosmic question mark, but the big question really is how does the bright gas and dark dust tell this nebula’s history of star formation. At the edge of a giant molecular cloud toward the northern constellation Cepheus, the glowing...