[math-fun] mini-me black hole in center of Milky Way

As is nowadays well known, the Milky Way contains a big central black hole, mass = 4*10^6 Msun. (The mass of the whole Milky Way is of order 10^12 Msun.) http://iopscience.iop.org/article/10.3847/2041-8205/816/1/L7 SIGNATURE OF AN INTERMEDIATE-MASS BLACK HOLE IN THE CENTRAL MOLECULAR ZONE OF OUR GALAXY Tomoharu Oka, Reiko Mizuno, Kodai Miura, and Shunya Takekawa Ap.J. letters now claims evidence that orbiting it only about 200 light years away is a second hole with mass about 10^5 Msun. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)