How far the Milky Way's disk extends has long been difficult to define—it doesn't end sharply, but fades away gradually at ...

A new study suggests that most "post-starburst galaxies" cease star formation because they run out of fuel. But that's not ...

Messier 104, nicknamed the Sombrero Galaxy, is a popular target for amateur observing and astronomical research. Its ...

Physics is riddled with paradoxes: Think of how information leaks from supposedly inescapable black holes or how the ...

Webs of star-shaped cells called astrocytes connect distant parts of the brain, allowing long-distance exchange of molecules.