A schematic illustration showing how differences in the distribution of dark matter (red) alter the spin rates of modern-day spiral galaxies (left) and spiral galaxies from the early universe (right). Modern spiral galaxies tend to spin faster than their counterparts in the distant, earlier universe due to greater concentrations of dark matter near their centers. Credit: ESO/L. Calçada
Topics: Astronomy, Astrophysics, Cosmology, Dark Matter

Although the invisible substance known as dark matter dominates galaxies nowadays, it was apparently only a minor ingredient of galaxies in the early universe, a new study finds.

This new finding sheds light on how galaxies and their mysterious "haloes" of dark matter have changed over time, researchers said.

Dark matter is thought to make up about 84 percent of the matter in the universe. Although dark matter is invisible, its presence can be inferred by its gravitational effects on visible matter. For instance, previous work discovered that the outer parts of galactic disks whirl faster than expected around the cores of those galaxies. These findings make sense if one assumes that "haloes" of dark matter envelop those galaxies and gravitationally pull at their outer regions. [The Search for Dark Matter in Pictures]

Now, the researchers unexpectedly find that in the early universe, dark matter played a much smaller role in galaxies than previously thought. The scientists detailed their findings in the March 16 issue of the journal Nature.

Using the European Southern Observatory's Very Large Telescope in Chile, the researchers examined six massive, star-forming galaxies from the early universe during the peak of galaxy formation 10 billion years ago. They analyzed the rotation of these galaxies to calculate how much dark matter they possessed.

Scientific American: Dark Matter Did Not Dominate Early Galaxies, Charles Q. Choi

Views: 21

Comment

You need to be a member of BlackScienceFictionSociety to add comments!

Join BlackScienceFictionSociety

Badge

Loading…

IMPORTANT ALERTS

ALERT! ALERT! ALERT! 

IF YOU ARE HAVING TROUBLE CHANGING YOUR PROFILE  PICTURE, SWITCH TO EITHER CHROME BROWSWER OR FIREFOX. THERE IS A KNOWN ISSUE WITH INTERNET EXPLORER THAT CAUSES TROUBLE CHANGING PICTURES.


PLEASE DO NOT SIGN IN WITH FACEBOOK IF YOU ALREADY HAVE AN ACCOUNT. YOU WILL CREATE A DUPLICATE THAT WILL NOT HAVE YOUR INFO CONNECTED. THANKS

NO SPAMMING

Please do not greet everyone on the site with large images and/or announcements of your book or business. Yes, you want to tell the world, but learn the fine art of subtlety. We have lost numerous members because of the amount of 'friend' mail they instantly receive. This Hurts Everyone.

Also, DO NOT post the same information multiple times throughout the site. It will be deleted without notice.

 

Spam is unsolicited advertising, whether it is posted as comments on other members' pages or is emailed for marketing purposes.

 

Please be considerate. Post your advertisement in the proper Articles/Forum or Group. There are inexpensive marketing channels that reach every member for just $25 on the Advertising tab. You can post your information on your profile and even update your blog as often as you like.

 

We are not into censorship, so please don't make us ask you to leave. Be kind and unselfish - don't spam.

 

Your Account Will Be Deleted Without Warning For Spam.

 

Blog Posts

The Fifth Season is coming to TV!

Posted by Stephen Alexander on August 17, 2017 at 5:48am 0 Comments

N.K. Jemisin’s ‘The Fifth Season’ Book To Be Developed As TV Series At TNT!

Now Mr. Hayashi can't complain about there being no other famous black creatives than Delany and Butler. 

http://deadline.com/2017/08/nk-jemisin-the-fifth-season-book-developed-tv-series-tnt-1202150542/

Now who says diversity doesn't sell?! If some yesteryear agent says that, throw this article in their face and say "Are you sure? Now get me TNT's president and NO I won't hold!" 

Of course, this assumes TNT won't screw this up like they did the TFTC revival. 

The Right to Science...

Posted by Reginald L. Goodwin on August 17, 2017 at 4:26am 0 Comments

Image Source: European Society of International Law, Vol 4, Issue 1 Editorial board: Anne van Aaken (editor-in-chief), Jutta Brunnée, Başak Çali, Jan Klabbers

Topics: Civil Rights, Human Rights, Science, Research

The…
Continue

The Black Ring Society: Prologue: The Ways of Worlds

Posted by Nelo Maxwell on August 16, 2017 at 12:07pm 0 Comments

Every story has not two, but multiple sides to it. Some span lifetimes others generations and some very rare ones span realities. It all depends on how many dimensions you can see it in. This is one such story, a story of family, of secrets and the duty that goes along with it. This story has and is being played out on multiple planes of existence, sometimes one after the other, sometimes simultaneously. The details of the story and how it relates to itself among the various realities is complicated but needless to say this chapter of it, which will probably be a long one, should help to elaborate on the intricacies of the grander picture in both depth and scope. I’m am aware that in this reality there is a tendency to reject or block out things which the mind cannot comprehend, but I assure you that this is not only comprehensible but completely understandable. However that is only for the few who would understand this sort of thing. A myth wrapped in a legend packaged in a good bit… Continue

The Black Ring Society: Prologue: The Ways of Worlds

Posted by Nelo Maxwell on August 16, 2017 at 12:07pm 0 Comments

Every story has not two, but multiple sides to it. Some span lifetimes others generations and some very rare ones span realities. It all depends on how many dimensions you can see it in. This is one such story, a story of family, of secrets and the duty that goes along with it. This story has and is being played out on multiple planes of existence, sometimes one after the other, sometimes simultaneously. The details of the story and how it relates to itself among the various realities is complicated but needless to say this chapter of it, which will probably be a long one, should help to elaborate on the intricacies of the grander picture in both depth and scope. I’m am aware that in this reality there is a tendency to reject or block out things which the mind cannot comprehend, but I assure you that this is not only comprehensible but completely understandable. However that is only for the few who would understand this sort of thing. A myth wrapped in a legend packaged in a good bit… Continue

The Digital Brothers Multimedia

The Digital Brothers
Our goal is to provide cost effective technological solutions for home, small and big business. After over 20 years of service working in this field, we decided to utilize our talents to develop and cultivate our own vision to benefit the community.
2D & 3D Animation
Graphic & Web Design
Photo & Video
Multimedia Development
Online & Print Marketing

Contact Us Today To Assist In Your Business Success
Website: www.TheDigitalBrothers.com
Email: info@thedigitalbrothers.com

SKYCITY TALKRADIO

THE UNDERGROUND BY ROXANNE BLAND

Life as alpha of a werewolf pack is anything but predictable. But even Parker Berenson is surprised by the latest twist: he’s fallen in love with a space alien. Problem is, he suspects Melera, his sexy new flame, might be the serial killer terrorizing Seattle. Or maybe she isn’t. After all, just because she’s an interstellar assassin doesn’t mean she’s guilty.

http://blackrosepress.com/

© 2017   Created by Jarvis Sheffield - Admin.   Powered by

Badges  |  Report an Issue  |  Terms of Service