The Cosmological Visualization Project Forum
We hope you will collaborate, contribute, discuss, and share your ideas with us here
This forum is supposed to represent a preparatory platform for Fridger's
ambitious project of scientific visualization beyond our Milky Way, i.e essentially beyond the proper reach of Celestia
The underlying space-time framework must be radically modified to rest on General Relativity
, include the expansion of the Universe
, use a proper (comoving) distance definition at cosmological time and length scales, focus on the large scale filiamentary structure of matter
, on Dark Matter and weak lensing
and many other exciting cosmological visualization aspects at the pioneering research front.
One crucial pilar of approach, is to incorporate a so-called 3D conformal display mode
"3D conformal kinematics" will make it possible to travel essentially from ones backyard seemlessly
to the high redshift frontier, even close to the origin of the cosmic microwave background (CMB) radiation [where the Universe becomes opaque
and was only ~400 000 years
The conformal mapping in 2D has only recently been invented and exploited with tremendous success, both in the media and among the science community. Not surprisingly, since it comes from a pretty good address
Such a 3D conformal projection of the entire Universe preserves shapes locally. Objects are displayed with sizes that are proportional to the actual (angular) sizes they subtend in the sky.
Yet distances appear squeezed logarithmically
Crucial progress for our visualization project came recently from the publication of extensive "Mock Catalogs"
of large-scale structure "data" that have been achieved with huge amounts of computer resources, based on the N-body simulation algorithm. On the one hand, they perfectly match the real Sloan Digital Sky Survey (SDSS)
data, on the other hand they directly reflect the underlying cosmological model and its parameters.
Most importantly for visualization, and unlike the SDSS data, the "mock" data provide a smooth data coverage of a large volume in space-time!
Just watch this and get inspired....
- The Dark Matter Filiaments in the Universe (640x480, divx5 format, 13.4 MB)
Caption: "This video shows the DARK MATTER distribution in the Universe at the present time, based on the Millennium Simulation, the largest N-body simulation carried out thus far (more than 10000000000 particles). By zooming in on a massive cluster of galaxies, the movie highlights the morphology of the structure on different scales, and the large dynamic range of the simulation (100000 per dimension in 3D). The zoom extends from scales of several Gpc down to resolved substructures as small as ~10 kpc."
(If divx5 video is not displayed, please go to
Fridger's MiniTutorial to find out about the simple remedies! )
If things eventually work for you, don't miss this one
- Fast 3D flight through the "Millenium" Universe (1024 x768, divx5, 60 MB )
Caption: "A 3-dimensional visualization of the Millennium Simulation. The movie shows a journey through the simulated universe. On the way, we visit a rich cluster of galaxies and fly around it. During the two minutes of the movie, we travel a distance for which light would need more than 2.4 billion years."
When you look at the real data from the Sloan Digital Sky Survey (SDSS), precisely this sort of large-scale filiaments of millions of galaxies are also observed for luminous matter.
Most interestingly physics-wise, one may directly visualize the impact of different geometries i.e. cosmologies
of space-time etc. Given these data, there are also very ambitious plans for visualization of directly related cosmological observables, like the power spectrum, etc.
All this will be paired with another longstanding pilar of approach, visualization in variable wave-length bands!
As a senior scientist and expert in theoretical cosmology, Fridger
knows about the strongly growing demand for scientifically accurate visualization tools in this pioneering area. He is also aware of the huge fascination this growing field has for the upcoming generation of young scientists ...
So we hope also on YOUR enthusiasm and active help to make this project come to life!