The gravity holding these galaxies exists because of this invisible mass. For decades ... large gravitational force pulling it towards the center of the shell,” Lieu explained.
A black hole is a region in space where gravity is so strong ... hunt for elusive intermediate-mass black holes continues. There could still be one at the center of Omega Centauri, but our work ...
the European Center for Medium-Range Weather Forecasts, or ECMWF, and Oak Ridge National Laboratory used the lab's Summit supercomputer to better understand atmospheric gravity waves, which ...