Everything that has been previously known about the formation of galaxies might be about to change following the latest discovery.
Back in March 2018, researchers at Yale University have presented the results for their observations of the galaxy NGC1052-DF2. When this happened, their work has been met with a mixture of praise and criticism.
The research has suggested back then that the unusual galaxy contained almost no dark matter and it’s essential to learn that this idea contradicts the existing dark matter theory. That’s why the event drew tons of attention.
A team that was led by Sol Goldman Family Professor of Astronomy at Yale University, Pieter van Dokkum, has discovered yet another galaxy that doesn’t contain any dark matter.
Dark matter is separable from galaxies
Now, this discovery supports their initial observations that dark matter is actually separable from galaxies.
This discovery may require people to completely rethink all assumptions that have been made regarding the way in which galaxies are formed.
We cannot see dark matter, but it is believed to make up a large part of the universe’s mass. The galaxies consist of dark matter as well as normal matter such as planets and stars.
Now, the scientists’ discovery of such galaxies that do not contain dark matter is one without precedent, and it definitely comes as a surprise.
“The fact that we’re seeing something that’s just completely new is what’s so fascinating,” said Shany Danieli in Keck Observatory, who first spotted the galaxies two years ago. “No one knew that such galaxies existed, and the best thing in the world for an astronomy student is to discover an object, whether it’s a planet, a star, or a galaxy, that no one knew about or even thought about.”
The second galaxy that lacks dark matter has been dubbed NGC 1052-DF4, and this finding is just as exciting for the researchers as the original discovery of DF2.
And, as a conclusion, here’s an observation, just to set some things straight: if dark matter cannot be directly seen or observed, this does not mean that it cannot be detected. Here’s some interesting info on detecting the presence/absence of dark matter.
Rada attended the courses in the Faculty of Letters, Romanian-English section, and finished the Faculty of Theatre and Television, Theatrical Journalism section, both within the framework of Babeş-Bolyai University of Cluj-Napoca. Up ’til now, she reviewed books, movies, and theatre-plays, enjoying subjects from the cultural niche. Her experience in writing also intersects the IT niche, given the fact that she worked as a content editor for firms that produce software for mobile devices. She is collaborating with online advertising agencies, writing articles for several websites and blogs.