Sentences with phrase «stellar birth rate»

But the crash should have done more than shut down the unfortunate galaxies» stellar birth rate.

This cycle of heating and cooling could be the main reason behind the «arrested development» seen in many massive elliptical galaxies that have lower - than - expected stellar birth rate.

Galaxies in today's Universe show a striking diversity among their properties, with large variations in their appearance, age, size, weight, and stellar birth rate.

Not exact matches

The amount of oxygen in a galaxy is determined primarily by three factors: how much oxygen comes from large stars that end their lives violently in supernova explosions — a ubiquitous phenomenon in the early Universe, when the rate of stellar births was dramatically higher than the rate in the Universe today; how much of that oxygen gets ejected from the galaxy by so - called «super winds,» which propel oxygen and other interstellar gases out of galaxies at hundreds of thousands of miles per hour; and how much pristine gas enters the galaxy from the intergalactic medium, which doesn't contain much oxygen.