giant structures

A giant structure hidden in deep space is challenging human understanding of the universe
A giant structure in the distant universe is challenging our understanding of how the universe evolved.
The new discovery of a star is said to be a giant structure of aliens
Emitting oddly isolated lights, Tabby's Star makes people think that it is something that aliens have built.
The mysterious circle is the largest 5 billion light-years from the universe
A Hungarian-American research group has discovered a giant mysterious circle that is the result of gamma-ray bursts. It is the largest in the universe and 5 billion light-years