Oumuamua and Comet Borisov in 2017 and 2019, respectively, created a surge of interest. What were they? Where did they come ...
With a length of 428 megaparsecs, or around 1.39 billion light-years, the superstructure is the biggest ever spotted.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback