Cosmology
Watch this pace
Is the expansion of the universe slowing down or speeding up? The jury is out.
The fuzzball googly
Physicists tackle a 50-year-old paradox sharpened by Stephen Hawking.
Star spotter
A Scottish immigrant, once a housekeeper, found hundreds of celestial objects.
Mystery of the monsters
Astrophysicists are peering deep into the universe's past, uncovering multiple pathways to supermassive black holes.
Too vast to last
Fresh energy across a galaxy cluster may keep its giant glow alive.
