In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

The Euclid space telescope has, by chance, discovered its first Einstein ring, and it is absolutely stunning. Beyond its aesthetic appeal, this perfectly circular Einstein ring has allowed researchers ...

While confirming a dark galaxy is challenging, there are several candidates that meet the criteria. Moreover, there are galaxies that, while not entirely dark, come close to that definition due to ...

The Andromeda Galaxy is a time capsule of the early universe, containing stars and other celestial objects that date back to the dawn of time. On a clear, dark night, the Andromeda Galaxy is ...

This was the birth of our modern universe of galaxies, so poetically celebrated in Seeing in the Dark. Today, astronomers have measured the distance to the Andromeda Galaxy much more precisely ...

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 ...