The authors consider this is a new branch of learning in the interdisciplinary between astronomy and disasters.
提出了天文灾害的概念，认为它是天文学与灾害科学交叉研究的一个新的分支学科。
At first,the various fractals of different levels in astronomy and cosmology are introduced.
在引入天文学和宇宙论中不同层次的分形后,把它推广到任意直线型的泛分形理论和一般化的分形天文学。
