There are three main types of galaxies: elliptical, spiral and irregular. The largest galaxies are called elliptical because they look like big globes of light emitted from a multitude of stars.

The largest galaxies are called elliptical because they look like big globes of light emitted from a multitude of stars. The most famous elliptical galaxy is M87, which has up to 2.4 trillion stars.

The "deaths" of galaxies are caused by their central supermassive black holes, and the "smoking gun" evidence of this connection takes an unexpected form.