Active galactic nuclei (AGN) are among the most energetic phenomena observed in the universe. These luminous objects, powered ...
The work has revealed that Andromeda is a lot more chaotic than expected. Similar to what recently retired Gaia did for the Milky Way, Hubble spotted the hallmarks of a past collision: the presence of ...
In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...