Galaxy classification has long been based on their visible appearance, creating well-defined categories. Spiral galaxies like our Milky Way display a flat disk structure with characteristic ...

You’ll see some irregular galaxies that look like nothing, and some barred spirals that look like everything. Along the way, ...

Lacki suggests detecting the combined glow of the emissions of several civilizations. It’s an approach that comes with its ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...