A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.
While the appearance of Andromeda is not a once-in-a-lifetime event, it’s rare for someone to come across it at the right time and record it in a photograph.
When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Gianluca Masi, Virtual Telescope Project, Background: NASA, ESA and the Hubble Heritage ...
The solution to a persistent astronomical question that has puzzled scientists for half a century has emerged not from direct observation, but from the computing power of sophisticated computer ...