Lyman-alpha – Astronomy Now

Spectroscopic survey probes uncharted depths of Hubble Ultra Deep Field

1 December 2017 Astronomy Now

Astronomers at the European Southern Observatory have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances and properties of 1600 very faint galaxies, including 72 galaxies that have never been detected before, even by Hubble itself.

A new kind of supermassive black hole born in the infant universe

7 July 2016 Astronomy Now

Astronomers have discovered evidence for an unusual kind of black hole born extremely early in the universe. They showed that a recently discovered unusual source of intense radiation is likely powered by a “direct-collapse black hole,” a type of object predicted by theorists more than a decade ago.