Does Outer Space end or does the Universe go on forever?
Using big telescopes, astronomers see millions of galaxies out there – and they just keep going, in every direction
Astronomers observed the closest pair of supermassive black holes to Earth ever
They used the European Southern Observatory's Very Large Telescope (ESO's VLT)
There is something strange about our universe, scientists find after mapping the cosmos
The change could be far more fundamental, suggesting for instance that Einstein’s general theory of relativity could need replacing