Early-type galaxies are famous for *not* forming stars. But are they as inactive as they appear, or is there life in the old galaxy yet?
Giant stars live only a short time, but have a profound effect on the galaxies that host them. Investigating them doesn’t require them to be brought back from the dead however, as today’s paper shows.
The theory of a ‘galaxy main sequence’ has really taken hold of the astronomy community in the last few years. But how justified is this idea? Today’s paper: a challenge to the prevailing theory.
Every massive galaxy hosts a supermassive black hole – but how do these cosmic monsters affect the stars they share their galaxy with?
Major mergers (collisions between two galaxies of similar size) are some of the most dramatic cosmic events. But in the grand scheme of things, how important are they, really?