H-alpha Observations of M31 Candidate Nova AT2021ypnA. Valcheva,M. Minev,E. Ovcharov,А. Винокуров,P. NedialkovThe astronomer's telegram(2021)引用 0|浏览3AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要