SciencefromBig Think21 hours agoNASA watched this supernova blast expand for 25 yearsKepler's supernova remnant shows asymmetric expansion observed by Chandra over 25 years, with shockwave speeds ranging from 1,800 to 6,200 km/s.
SciencefromMail Online3 months agoScientists baffled by black hole growing at 2.4x the theoretical limitSupermassive black hole RACS J0320-35, about a billion solar masses and 12.8 billion light-years away, is accreting at 2.4 times the theoretical limit.