Education Black holes

1. A black hole is a place in space where gravity pulls so muchthat even light can not get out. The gravity is so strongbecause matter has been squeezed into a tiny space.…

Science An ultraluminous quasar_with_a_twelve_billion_solar_mass_black_hole_at_redshift_6_30

LETTER doi:10.1038/nature14241 An ultraluminous quasar with a twelve-billion- solar-mass black hole at redshift 6.30 Xue-Bing Wu1,2, Feige Wang1,2, Xiaohui Fan2,3, Weimin…