ESA’s decade-long Milky Way Gaia mapping mission still has tons of data to release over the next few years. Expect surprises.

We can judge the value of any scientific endeavour based on how much of our knowledge it overturns or transforms.

Recent studies challenge the long-held belief that the Milky Way is a standard model for understanding galaxy formation, ...

Scientists are keen to get to the bottom of the dark matter puzzle because this phenomenon accounts for the vast majority of the "stuff" in the universe — about 85%, in fact. That means everything we ...