The new group, designated CGG-z4, hosts two optically dark star-forming galaxies. The finding was detailed in a research paper published Jan. 9 on the pre-print server arXiv. Galaxy groups are the ...

Dark stars can be incredibly huge, stretching for thousands of light-years, while still having relatively low density. This would match observations of galaxy cores, which makes this an intriguing ...

The research team said these rings likely formed when a smaller galaxy shot through the heart of the Bullseye galaxy roughly ...