29 March 2018
A see-through galaxy questions the need for dark matter
... component of the Universe – making up a whopping ~80 percent of its mass – and the invisible glue that holds galaxies and galaxy clusters together. Although it has never been directly observed, scientists are confident that this elusive material...
06 December 2021
Astronomers find a galaxy with no dark matter
Thought to make up about 27 percent of the matter in the Universe and be the reason why galaxies and galaxy clusters do not fly apart, dark matter is key to our understanding of many cosmological phenomena. But now a new study by an ...
20 March 2020
Missing particle a major blow for "Theory of Everything"
... telescope observations of this high energy radiation streaming out from the heart of the galaxy cluster located 200 million light-years away. "Galaxy clusters contain magnetic fields over giant distances, and they also often contain bright...
16 June 2021
Astronomers discover the largest rotating objects in the Universe
...published in Nature. Then, using a sophisticated mapping method, galaxies within it were divided into two regions on either side ... of the project at the AIP. "On these scales the galaxies within them are themselves just specs of dust. They move ...
12 July 2022
Star billing for first Webb picture
...time to almost the very edge. A tantalising taster image of galaxy cluster SMACS 0723, known as Webb's First Deep Field, was ... Known as Webb’s First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail. “We are now even...
October 2016
The dwarf galaxy problem
... Figure 5 shows the location of these galaxies within the Virgo cluster. However, one big challenge when looking at galaxy clusters is determining how to tell apart dwarf galaxies in the cluster from bigger, background galaxies. How do you tell which...
