It is currently Mon Jun 17, 2019 7:22 am


Post new topic Reply to topic  [ 1 post ] 
Author Message
PostPosted: Thu Mar 29, 2018 4:11 pm 
Offline

Joined: Mon Jan 09, 2006 11:05 am
Posts: 5193
Location: Lancashire
Astrophysicists have discovered a galaxy that's devoid of dark matter. This has come as a surprise because blobs of dark matter are thought to be essential for "seeding" galaxies, gathering in the visible matter that stars are made from under gravity.
The newly-discovered "ghost galaxy" has a very low luminosity and was difficult to detect with existing instrumentation. The galaxy is catalogued as NGC-DF2.
Professor Pieter van Dokkum, of Yale University, said: There is no theory that predicted these types of galaxies. It is a complete mystery."
At a distance of 65 million light years, NGC-DF2 is one of a new family of "ultra-diffuse" galaxies; they contain very few stars, despite having a large size similar to the Milky Way.

_________________
brian


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group