active galactic nuclei

An artist's impression of how ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun, may have looked. Credit: ESO/M. Kornmesser, CC BY 4.0

Is the Universe Different In Different Directions?

Joel P. Joseph 29/04/2021

The answer to this deceptively simple question could also...

Screenshot 2020-09-02 at 4.15.47 PM

Physicists Detect Gravitational Waves From Heaviest Black-Hole Merger Yet

Abhirup Ghosh 02/09/2020

Astronomers have yet to find black holes between 100-...

Albert Einstein, general theory of relativity, gravitational lensing, Fritz Zwicky, Hubble constant, expansion of the universe, Sjur Refsdal, Orest Chwolson, Arthur Eddington, active galactic nuclei, black hole, Type Ia supernovae, Palomar Transient Factory,

How Astronomers Use Ginormous Natural Lenses to Study Distant Space Explosions

Suhail Dhawan 10/08/2019

Light bends around massive objects in space, so astronomers...

Seema UoH

How an Astronomer Is Trying to Solve Mysteries From Far-Off Galaxies

Nandita Jayaraj 02/04/2017

“We want to know why these galaxies are so...