The weird clouds could come from another galaxy.
It's about the size of 13 Jupiters smooshed together, which means that for a planet, it's really, really big.
Scientist traces the trajectories of 300,000 stars and found the ones most likely to brush past us in the future.
Supercomputer simulations reveal we are all made up of a bit of extragalactic matter.
Astronomers discover hypervelocity stars originally came from a dwarf galaxy orbiting the Milky Way.
Fast radio burst 150215 was detected in real-time with the Parkes radio telescope in Australia in 2015.
To get a meaningful answer, we need to collect more Milky way samples.
A study found that Americans use too many bright lights at night, while Germany keeps its sky relatively unpolluted.