Estimates suggest there are trillions of free-floating worlds in our galaxy alone. Most of them will be frozen planets like Pluto, but some might be warmer – and possibly even habitable

For the first time, astronomers have observed the area right at the edge of a black hole where matter stops orbiting and plunges straight in at near light speed

Gravitational waves can be lensed by massive galaxies so that they repeat, like an echo. Scientists are now readying to snare their first one and explore the cosmic secrets it holds

Galaxies could do with a few more arms or some decorative designs – on this episode of Dead Planets Society, our hosts are using collisions, black holes and dark matter to reshape our galaxy

A white dwarf star orbiting a sun-like star was thought to be impossibly small, but now astronomers have found another star in the system that solves the puzzle

A rare geomagnetic storm not seen for nearly 20 years could cause a stunning aurora borealis on 10 and 11 May