Giant Ultrafaint Galaxy Could Offer Dark Matter Clues
In the summer of 2015 Ignacio Trujillo was sifting through deep-sky images when a slice of constellation Cetus (“whale”) caught…
Many-Mirrored Galaxies Deepen Dark Matter Mystery
If you’re looking for intergalactic eye candy and cosmic bling, it’s hard to beat Abell 3827, a crowded cluster of…
The Loss of Dark Skies Is So Painful, Astronomers Coined a New Term for It
Humanity is slowly losing access to the night sky, and astronomers have invented a new term to describe the pain…
JWST Might Have Spotted the First Dark Matter Stars
In a first, the James Webb Space Telescope (JWST) may have glimpsed a rare type of star that astronomers aren’t…