Astronomy, Astrophysics, Spectroscopy, Black Holes, Science.
black hole, which astronomers have demonstrated to be much less massive that first reported. Image credit: NASA, ESA, F. Paresce (INAF-IASF, Bologna, Italy), R. O’Connell (University of Virginia, Charlottesville), and the Wide Field Camera 3 Science Oversight Committee. Naturally, astronomers were