24 May 2016
Astronomers find ultra diffuse galaxy heavy in dark matter
... for each kilogram of ordinary material, VCC 1287 contains 3 tonnes of dark matter. Ultra diffuse galaxies (UDGs) have the sizes of giant galaxies but the luminosities of dwarf galaxies and it is these properties that have helped UDGs stay hidden for...
28 November 2018
A hidden giant found lurking close to the Milky Way
... of any system by far and is approximately 100 times more diffuse than the so-called ultra diffuse galaxies (UDGs) that populate the Universe. Despite living up to their names as ultra-diffuse, UDGs can still be the same size and mass as the...
29 March 2018
A see-through galaxy questions the need for dark matter
... formed and a starting point is to hunt for more dark-matter deficient galaxies. Luckily, their studies might be given an early boost as Hubble images of 23 other ultra-diffuse galaxies seem to suggest that three of them are similar to NGC 1052-DF2...
06 December 2021
Astronomers find a galaxy with no dark matter
... buck the trend. In 2018, Pieter van Dokkum at Yale University, USA, and colleagues found an ultra-diffuse galaxy known as NGC1052-DF2 with hardly any dark matter, suggesting instead that this elusive material is “a distinct “...
25 June 2015
The story behind ultra dark galaxies
...’t been able to spot before due to their extremely low density. What’s interesting about these galaxies – which have also been dubbed as ultra diffuse galaxies, or UDGs – is that even though they contain very little gas as compared to what we think...
