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Nov 19, 2015 09:01 PM ET // Ian O'Neill
While measuring the speed of stars whirling around a nearby dwarf galaxy, astronomers have realized that a reservoir of dark matter may be lurking within.
Nov 19, 2015 07:00 AM ET // Ian O'Neill
Astronomers have detected something baffling at the furthest frontiers of our observable universe: lots of massive galaxies that shouldn't even exist.
Nov 17, 2015 06:58 PM ET // Ian O'Neill
Shimmering deep inside a cosmic supervoid is MCG+01-02-015, a pristine galaxy that is the undisputed galactic loner of the universe.
Nov 12, 2015 06:17 PM ET // Ian O'Neill
Like a blinding beacon lighting up the night, a powerful gamma-ray-generating stellar husk has been seen pulsating in a neighboring galaxy.
Sep 23, 2015 01:00 PM ET // Irene Klotz
Distant galaxies birthing baby stars up to 1,000 times the rate of the Milky Way have been a long-standing mystery -- until now.
Sep 22, 2015 04:01 PM ET // Ian O'Neill
As stars whip around our galaxy's supermassive black hole, they should generate their own special kind of 'sonic boom' -- could astronomers detect them?
Aug 28, 2015 05:58 PM ET // Ian O'Neill
In a galaxy, 600 million light-years away, a black hole deathmatch is ripping up spacetime, exposing some fascinating dynamics at the heart of a powerful quasar.
Aug 28, 2015 11:55 AM ET // AFP
From round disks to oval clusters; many galaxies in the Universe have undergone a dramatic transformation over the past eight billion years or so.
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