iSGTW - International Science Grid This Week
iSGTW - International Science Grid This Week

Home > iSGTW - 17 November 2010 > Image of the Week - Elegance of darkness

Image of the Week - Elegance of darkness

When galaxies collide. Original courtesy Argonne National Laboratory

What you see is the collision of two galaxies over billions of years, albeit virtually.

As physicists at CERN investigate the smallest particles in the universe, US scientists are studying the behavior of the largest cosmic structures in existence. A team at the University of Chicago Flash Center and the Harvard-Smithsonian Center for Astrophysics used an Argonne National Laboratory Supercomputer to identify elusive dark matter. The researchers simulated the motion and collision of galactic clusters — some of the largest structures in the universe — to infer dark matter’s influence, as it cannot be observed directly. Dark matter greatly influences gas and galaxies over trillions of light years.
Furthermore, these collisions more accurately predict the interaction of both normal and dark matter (it is thought dark matter constitutes 23% of the universe’s observable mass, while normal matter only makes up 4.6%). The model initially simulates clumps of dark matter particles as they coalesce via an oxymoronic process called 'violent-relaxation.' Subsequent presentations portray the ‘gaseous-galactic clusters’ interacting directly.

Finally, the dark matter particles and gases are overlaid onto one another and their intricate interactions are played out. The dark matter cores of each galaxy collide and move past each other. Once settled, their motion enables the normal gaseous matter to interact and mix. See the hypnotizing cosmic dance for yourself by clicking on the image above and playing the video. (Watch it at 720p for highest quality.)

- Adrian Giordani, iSGTW


 iSGTW 22 December 2010

Feature – Army of Women allies with CaBIG for online longitudinal studies

Special Announcement - iSGTW on Holiday

Video of the Week - Learn about LiDAR


NeHC launches social media

PRACE announces third Tier-0 machine

iRODS 2011 User Group Meeting

Jobs in distributed computing


Enter your email address to subscribe to iSGTW.


 iSGTW Blog Watch

Keep up with the grid’s blogosphere

 Mark your calendar

December 2010

13-18, AGU Fall Meeting

14-16, UCC 2010

17, ICETI 2011 and ICSIT 2011

24, Abstract Submission deadline, EGI User Forum


January 2011

11, HPCS 2011 Submission Deadline

11, SPCloud 2011

22, ALENEX11

30 Jan – 3 Feb, ESCC/Internet2


February 2011

1 - 4, GlobusWorld '11

2, Lift 11

15 - 16, Cloudscape III

More calendar items . . .


FooterINFSOMEuropean CommissionDepartment of EnergyNational¬†Science¬†Foundation RSSHeadlines | Site Map