Black holes are the most powerful destructive forces in the universe. They can rip apart a star and scatter its ashes out of the galaxy at nearly the speed of light. But these engines of destruction can also pave the way for new stars to form, as a new study in Nature shows.
The study looks at the question of why some galaxies actively create stars, while others do not. For example, in the Milky Way galaxy, new stars form at an average rate of 1 – 2 per year. Other galaxies, known as starburst galaxies, have extremely active star-producing regions. But in some galaxies, there is almost no star production. These “quenched” galaxies are often smaller satellite galaxies to larger galaxies.
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