Hubble’s “magnum opus”: most precise measurement of universe’s expansion (photo)
We have known for the better part of a century that the universe is expanding by the observation that galaxies are moving away from us
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 spot mysterious object unlike any seen before
Strange Milky Way object sends radio bursts a minute at a time
