Astrophysical Journal

Lone planetary-mass object found in family of stars

In 2011, astronomers announced that our galaxy is likely teeming with free-floating planets. In fact, these lonely worlds, which sit quietly in the darkness of space without any companion planets or even a host sun, might ...

dateApr 20, 2016 in Astronomy
shares4133 comments 7

Dark matter guides growth of supermassive black holes

Every massive galaxy has a black hole at its center, and the heftier the galaxy, the bigger its black hole. But why are the two related? After all, the black hole is millions of times smaller and less massive than its home ...

dateFeb 18, 2015 in Astronomy
shares201 comments 63

Black hole chokes on a swallowed star

A five-year analysis of an event captured by a tiny telescope at McDonald Observatory and followed up by telescopes on the ground and in space has led astronomers to believe they witnessed a giant black hole tear apart a ...

dateJan 26, 2015 in Astronomy
shares2356 comments 56