It’s just the end of the observable universe, which could one day expand as space exploration technology grows more complex and powerful. Having an interactive map of the universe on hand is ...

and hence the distance to them in an expanding universe, in an observed volume of space. With such galactic distance measurements, it's actually possible to create a three-dimensional map of the ...

The "dark universe detective" space telescope Euclid has discovered its first Einstein ring in the process, learning about ...