NASA scientists spotted pops of blue and green X-rays in a distant galaxy. What caused them to shine, exactly, is mystifying scientists.
원문출처 : https://www.cnn.com/2019/09/09/us/nasa-x-ray-light-mystery-scn-trnd/index.html
원문출처 : https://www.cnn.com/2019/09/09/us/nasa-x-ray-light-mystery-scn-trnd/index.html