The article discusses the prevalence of small, ultra-faint galaxies in the Universe, highlighting that they constitute the majority yet represent only about 1% of all galaxies. These galaxies, such as Ursa Major III/UNIONS 1âthe faintest and smallest galaxy discovered with just 16 solar massesâare dominated by dark matter, making them challenging to detect. Advances in deep surveys have led to the discovery of these elusive galaxies, enhancing our understanding of cosmic evolution and the distribution of matter in the Universe.
"Most of the galaxies present in the Universe are small, low in mass, contain very few stars overall, but are dominated largely by dark matter."
"The discovery of Ursa Major III/UNIONS 1, with a total stellar mass of just 16 solar masses, represents the faintest, smallest, lowest-mass galaxy ever discovered."
"Ultra-faint galaxies are exceedingly difficult to detect and require wide, deep surveys to reveal them as well as measurements to determine star distances."
"The majority of stars present within the Universe today are found in galaxies comparable in size to the Milky Way, but they only represent about ~1% of all galaxies."
Collection
[
|
...
]