Using data from the Rossi X-ray Timing Explorer (RXTE) satellite, astronomers from the Florida Institute of Technology have discovered a quasi-periodic oscillation (QPO) in the galaxy NGC 4945. The finding, reported in a paper published September 28 on the arXiv preprint server, could shed more light on the nature of this galaxy.
Source:
https://phys.org/news/2020-10-quasi-periodic-oscillation-galaxy-ngc.html