Imagine a space so vast and empty it could make even the bravest astronaut feel a shiver down their spine. Well, that's the ...

If our galaxy was in the middle of the Boötes void, we wouldn’t have known there were other galaxies until the 1960s.

When looking up at the sky at night, it’s easy to get the impression that the stars go on forever in fairly uniform fashion. We know, of course, that this isn’t the case. Stars coalesce into galaxies, ...

Most of us would consider Bootes the Bear Guard a spring constellation. That's when it first appears in the eastern sky, following the tail of Ursa Major the Great Bear as the snow drifts recede. Come ...