In recent decades , with rapid development in space science and computer technologies , astronomers discovered many new and exotic celestial objects . some celestial objects like supernova 1987a can help to reinforce the theory of stellar evolution . but others such as gamma ray sources pose more headaches and sometimes conflicting theories 近年來,由于太空科技及電腦技術(shù)的迅速發(fā)展,天文學家發(fā)現(xiàn)了很多以往從未見過的新天體,有些天體例如超新星1987a能令恒星理論基礎更加鞏固,但亦有一些奇異天體例如伽瑪射線源卻令天文學家感到束手無策。