单选题

　　[概括大意]Take the case of Eta Carinae， one of the most explosive stars in the universe. This star produces ultraviolet laser rays（紫外线） and it will destroy itself in a few million years‘ time. It is five times brighter than the sun and when it explodes it is going to be a sight worth waiting for！

　　The main idea of this paragraph is__________.

　　A、Power of the telescope

　　B、Details of Eta Carinae

　　C、Invention of a time machine

　　D、Biggest telescope