Astronomers have completed the largest survey to date of the faint outskirts of nearby galaxies, successfully testing a low-cost system for exploring these local stellar systems. R. Michael Rich of the University of California, Los Angeles led an international team carrying out a survey for the Haloes and Environments of Nearby Galaxies (HERON) collaboration, published in a paper in Monthly Notices of the Royal Astronomical Society. The team find that the diameters of the galactic outskirts—the haloes—appear to correlate with the brightness and type of galaxy.
![](https://scx1.b-cdn.net/csz/news/tmb/2019/heronsurveyf.jpg)
Source:
https://phys.org/news/2019-10-heron-survey-fishes-ghostly-galaxy.html